# CVE-2026-43420: linux: In the Linux kernel, the following vulnerability has been resolved:  ceph: fix i_nlink underrun during async unlink...

CVE-2026-43420 is fixed in 114 products on 1 platform, first by ALAS2023-2026-1594, released April 27, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-43420
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0009
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 27, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:  ceph: fix i_nlink underrun during async unlink  During async unlink, we drop the `i_nlink` counter before we receive the completion (that will eventually update the `i_nlink`) because "we assume that the unlink will succeed".  That is not a bad idea, but it races against deletions by other clients (or against the completion of our own unlink) and can lead to an underrun which emits a WARNING like this one:   WARNING: CPU: 85 PID: 25093 at fs/inode.c:407 drop_nlink+0x50/0x68  Modules linked in:  CPU: 85 UID: 3221252029 PID: 25093 Comm: php-cgi8.1 Not tainted 6.14.11-cm4all1-ampere #655  Hardware name: Supermicro ARS-110M-NR/R12SPD-A, BIOS 1.1b 10/17/2023  pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)  pc : drop_nlink+0x50/0x68  lr : ceph_unlink+0x6c4/0x720  sp : ffff80012173bc90  x29: ffff80012173bc90 x28: ffff086d0a45aaf8 x27: ffff0871d0eb5680  x26: ffff087f2a64a718 x25: 0000020000000180 x24: 0000000061c88647  x23: 0000000000000002 x22: ffff07ff9236d800 x21: 0000000000001203  x20: ffff07ff9237b000 x19: ffff088b8296afc0 x18: 00000000f3c93365  x17: 0000000000070000 x16: ffff08faffcbdfe8 x15: ffff08faffcbdfec  x14: 0000000000000000 x13: 45445f65645f3037 x12: 34385f6369706f74  x11: 0000a2653104bb20 x10: ffffd85f26d73290 x9 : ffffd85f25664f94  x8 : 00000000000000c0 x7 : 0000000000000000 x6 : 0000000000000002  x5 : 0000000000000081 x4 : 0000000000000481 x3 : 0000000000000000  x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff08727d3f91e8  Call trace:   drop_nlink+0x50/0x68 (P)   vfs_unlink+0xb0/0x2e8   do_unlinkat+0x204/0x288   __arm64_sys_unlinkat+0x3c/0x80   invoke_syscall.constprop.0+0x54/0xe8   do_el0_svc+0xa4/0xc8   el0_svc+0x18/0x58   el0t_64_sync_handler+0x104/0x130   el0t_64_sync+0x154/0x158  In ceph_unlink(), a call to ceph_mdsc_submit_request() submits the CEPH_MDS_OP_UNLINK to the MDS, but does not wait for completion.  Meanwhile, between this call and the following drop_nlink() call, a worker thread may process a CEPH_CAP_OP_IMPORT, CEPH_CAP_OP_GRANT or just a CEPH_MSG_CLIENT_REPLY (the latter of which could be our own completion).  These will lead to a set_nlink() call, updating the `i_nlink` counter to the value received from the MDS.  If that new `i_nlink` value happens to be zero, it is illegal to decrement it further.  But that is exactly what ceph_unlink() will do then.  The WARNING can be reproduced this way:  1. Force async unlink; only the async code path is affected.  Having    no real clue about Ceph internals, I was unable to find out why the    MDS wouldn't give me the "Fxr" capabilities, so I patched    get_caps_for_async_unlink() to always succeed.     (Note that the WARNING dump above was found on an unpatched kernel,    without this kludge - this is not a theoretical bug.)  2. Add a sleep call after ceph_mdsc_submit_request() so the unlink    completion gets handled by a worker thread before drop_nlink() is    called.  This guarantees that the `i_nlink` is already zero before    drop_nlink() runs.  The solution is to skip the counter decrement when it is already zero, but doing so without a lock is still racy (TOCTOU).  Since ceph_fill_inode() and handle_cap_grant() both hold the `ceph_inode_info.i_ceph_lock` spinlock while set_nlink() runs, this seems like the proper lock to protect the `i_nlink` updates.  I found prior art in NFS and SMB (using `inode.i_lock`) and AFS (using `afs_vnode.cb_lock`).  All three have the zero check as well.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | bpftool-debuginfo amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | bpftool6.12 amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | bpftool6.18 amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | bpftool6.18-debuginfo amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | cephfs sles 15.7 | 1.0-150700.15.7.1 | [SUSE-SU-2026:5111-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5111-1.md) | Nov 7, 2026 |
| Linux | kernel amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-debuginfo amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.66.1.150700.17.39.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-devel amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.66.2 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-headers amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-libbpf amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-libbpf-debuginfo amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-libbpf-devel amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-libbpf-static amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-livepatch-6.1.168-202.320 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-livepatch-6.12.79-101.147 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel-livepatch-6.18.20-20.229 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_17 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:2799-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2799-1.md) | Jul 8, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_18 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-modules-extra amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-modules-extra-common amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel-tools amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-tools-debuginfo amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-tools-devel amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | kernel-uek ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-core ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-core ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-core ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-core ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-devel ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-devel ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-core ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-core ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-deprecated ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-deprecated ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-desktop ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-desktop ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-extra ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-extra-netfilter ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-extra-netfilter ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-usb ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-usb ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-wireless ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-debug-modules-wireless ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-devel ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-devel ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-doc ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-doc ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-core ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-core ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-deprecated ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-deprecated ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-desktop ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-desktop ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-extra ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-extra ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-extra-netfilter ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-extra-netfilter ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-usb ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-usb ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-wireless ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-modules-wireless ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-tools ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek-tools ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-core ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-core ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-devel ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-devel ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-core ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-core ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-deprecated ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-deprecated ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-desktop ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-desktop ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-extra ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-extra ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-extra-netfilter ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-extra-netfilter ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-usb ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-usb ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-wireless ol 10 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-uek64k-modules-wireless ol 9 | 0:6.12.0-204.92.4.2.el9uek | [ELSA-2026-50372](https://patchblox.com/security/data/fix/linux/elsa-2026-50372.md) | Jul 2, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.66.1 | [SUSE-SU-2026:2800-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-2800-1.md) | Jul 8, 2026 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-libbpf amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-libbpf-debuginfo amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-libbpf-devel amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-libbpf-static amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | kernel6.18 amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-debuginfo amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-debuginfo-common-aarch64 amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-debuginfo-common-x86_64 amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-devel amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-headers amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-libbpf amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-libbpf-debuginfo amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-libbpf-devel amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-libbpf-static amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-modules-extra amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-modules-extra-common amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-tools amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-tools-debuginfo amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | kernel6.18-tools-devel amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.170-1 | [DEBIAN-CVE-2026-43420](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43420.md) | May 15, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.85-1 | [DEBIAN-CVE-2026-43420](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43420.md) | May 15, 2026 |
| Linux | linux Debian 14 | 6.19.10-1 | [DEBIAN-CVE-2026-43420](https://patchblox.com/security/data/fix/linux/debian-cve-2026-43420.md) | May 15, 2026 |
| Linux | perf amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | perf-debuginfo amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | perf6.12 amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | perf6.18 amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | perf6.18-debuginfo amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | python3-perf amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | python3-perf-debuginfo amzn 2023 | 1:6.1.168-202.320.amzn2023 | [ALAS2023-2026-1681](https://patchblox.com/security/data/fix/linux/alas2023-2026-1681.md) | May 11, 2026 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.79-101.147.amzn2023 | [ALAS2023-2026-1594](https://patchblox.com/security/data/fix/linux/alas2023-2026-1594.md) | Apr 27, 2026 |
| Linux | python3-perf6.18 amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |
| Linux | python3-perf6.18-debuginfo amzn 2023 | 1:6.18.20-20.229.amzn2023 | [ALAS2023-2026-1596](https://patchblox.com/security/data/fix/linux/alas2023-2026-1596.md) | Apr 27, 2026 |

---

Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.