# CVE-2025-40357: linux: In the Linux kernel, the following vulnerability has been resolved:  net/smc: fix general protection fault in __smc_d...

CVE-2025-40357 is fixed in 40 products on 1 platform, first by DEBIAN-CVE-2025-40357, released December 16, 2025. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2025-40357
- Priority: High
- CVSS: n/a (important)
- EPSS: 0.0020
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 16, 2025

## Description

In the Linux kernel, the following vulnerability has been resolved:  net/smc: fix general protection fault in __smc_diag_dump  The syzbot report a crash:    Oops: general protection fault, probably for non-canonical address 0xfbd5a5d5a0000003: 0000 [#1] SMP KASAN NOPTI   KASAN: maybe wild-memory-access in range [0xdead4ead00000018-0xdead4ead0000001f]   CPU: 1 UID: 0 PID: 6949 Comm: syz.0.335 Not tainted syzkaller #0 PREEMPT(full)   Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025   RIP: 0010:smc_diag_msg_common_fill net/smc/smc_diag.c:44 [inline]   RIP: 0010:__smc_diag_dump.constprop.0+0x3ca/0x2550 net/smc/smc_diag.c:89   Call Trace:    <TASK>    smc_diag_dump_proto+0x26d/0x420 net/smc/smc_diag.c:217    smc_diag_dump+0x27/0x90 net/smc/smc_diag.c:234    netlink_dump+0x539/0xd30 net/netlink/af_netlink.c:2327    __netlink_dump_start+0x6d6/0x990 net/netlink/af_netlink.c:2442    netlink_dump_start include/linux/netlink.h:341 [inline]    smc_diag_handler_dump+0x1f9/0x240 net/smc/smc_diag.c:251    __sock_diag_cmd net/core/sock_diag.c:249 [inline]    sock_diag_rcv_msg+0x438/0x790 net/core/sock_diag.c:285    netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2552    netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline]    netlink_unicast+0x5a7/0x870 net/netlink/af_netlink.c:1346    netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1896    sock_sendmsg_nosec net/socket.c:714 [inline]    __sock_sendmsg net/socket.c:729 [inline]    ____sys_sendmsg+0xa95/0xc70 net/socket.c:2614    ___sys_sendmsg+0x134/0x1d0 net/socket.c:2668    __sys_sendmsg+0x16d/0x220 net/socket.c:2700    do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]    do_syscall_64+0xcd/0x4e0 arch/x86/entry/syscall_64.c:94    entry_SYSCALL_64_after_hwframe+0x77/0x7f    </TASK>  The process like this:                 (CPU1)              |             (CPU2)   ---------------------------------|-------------------------------   inet_create()                    |     // init clcsock to NULL        |     sk = sk_alloc()                |                                    |     // unexpectedly change clcsock |     inet_init_csk_locks()          |                                    |     // add sk to hash table        |     smc_inet_init_sock()           |       smc_sk_init()                |         smc_hash_sk()              |                                    | // traverse the hash table                                    | smc_diag_dump_proto                                    |   __smc_diag_dump()                                    |     // visit wrong clcsock                                    |     smc_diag_msg_common_fill()     // alloc clcsock               |     smc_create_clcsk               |       sock_create_kern             |  With CONFIG_DEBUG_LOCK_ALLOC=y, the smc->clcsock is unexpectedly changed in inet_init_csk_locks(). The INET_PROTOSW_ICSK flag is no need by smc, just remove it.  After removing the INET_PROTOSW_ICSK flag, this patch alse revert commit 6fd27ea183c2 ("net/smc: fix lacks of icsk_syn_mss with IPPROTO_SMC") to avoid casting smc_sock to inet_connection_sock.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool6.12 amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-azure opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-azure sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.9.1.160000.2.6 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.28.1.150700.17.19.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.9.1.160000.2.6 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-livepatch-6.12.58-82.121 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_8 sles 15.7 | 1-150700.1.3.1 | [SUSE-SU-2026:0278-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0278-1.md) | Jan 23, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_8 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-source-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel-syms-azure sles 15.7 | 6.4.0-150700.20.24.1 | [SUSE-SU-2026:0281-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0281-1.md) | Jan 23, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.9.1 | [OPENSUSE-SU-2026:20145-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-20145-1.md) | Feb 2, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.28.1 | [SUSE-SU-2026:0315-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-0315-1.md) | Jan 28, 2026 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.9.1 | [SUSE-SU-2026:20220-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-20220-1.md) | Feb 2, 2026 |
| Linux | kernel6.12 amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-devel amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-headers amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-libbpf amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-libbpf-debuginfo amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-libbpf-devel amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-libbpf-static amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-tools amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.57-1 | [DEBIAN-CVE-2025-40357](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40357.md) | Dec 16, 2025 |
| Linux | linux Debian 14 | 6.17.6-1 | [DEBIAN-CVE-2025-40357](https://patchblox.com/security/data/fix/linux/debian-cve-2025-40357.md) | Dec 16, 2025 |
| Linux | perf6.12 amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | python3-perf6.12 amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |
| Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.58-82.121.amzn2023 | [ALAS2023-2026-1495](https://patchblox.com/security/data/fix/linux/alas2023-2026-1495.md) | Mar 16, 2026 |

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