linux: In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iuc...
CVE-2026-64004 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-64004, released July 20, 2026. It is not reported as exploited. Patch Radar priority: High.
In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix locking in .getsockopt Mirror iucv_sock_setsockopt() and wrap the whole switch in lock_sock()/release_sock(). The pre-existing SO_MSGLIMIT-only lock becomes redundant and is removed. Any AF_IUCV HIPER user can potentially crash the kernel by racing recvmsg() with getsockopt(SO_MSGSIZE): the SO_MSGSIZE arm dereferences iucv->hs_dev->mtu after iucv_sock_close() (called from the racing recvmsg()) has set hs_dev to NULL, producing a NULL pointer dereference oops.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-64kb · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-azure · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-default · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.38.1.160000.2.22 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-default-base · sles 15.7 | 6.4.0-150700.53.81.1.150700.17.45.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.38.1.160000.2.23 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-docs · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-livepatch-SLE15-SP7-RT_Update_20 · sles 15.7 | 1-150700.1.3.1 | SUSE-SU-2026:4120-1 | Sep 10, 2026 |
| kernel-livepatch-SLE15-SP7_Update_21 · sles 15.7 | 1-150700.15.3.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-obs-build · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-source · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-syms · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.38.1 | OPENSUSE-SU-2026:21910-1 | Sep 22, 2026 |
| kernel-zfcpdump · sles 15.7 | 6.4.0-150700.53.81.1 | SUSE-SU-2026:4254-1 | Oct 7, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.38.1 | SUSE-SU-2026:23902-1 | Sep 22, 2026 |
| linux · Debian 12.15 (bookworm) | 6.1.176-1 | DEBIAN-CVE-2026-64004 | Jul 20, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.94-1 | DEBIAN-CVE-2026-64004 | Jul 20, 2026 |
| linux · Debian 14 | 7.0.12-1 | DEBIAN-CVE-2026-64004 | Jul 20, 2026 |
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