CVE-2023-54112 Affecting kernel-source package, versions <6.4.0-150600.23.84.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-SLES156-KERNELSOURCE-15106432
- published27 Jan 2026
- disclosed26 Jan 2026
Introduced: 26 Jan 2026
CVE-2023-54112 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-source to version 6.4.0-150600.23.84.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-source package and not the kernel-source package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
kcm: Fix memory leak in error path of kcm_sendmsg()
syzbot reported a memory leak like below:
BUG: memory leak unreferenced object 0xffff88810b088c00 (size 240): comm "syz-executor186", pid 5012, jiffies 4294943306 (age 13.680s) hex dump (first 32 bytes): 00 89 08 0b 81 88 ff ff 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<ffffffff83e5d5ff>] __alloc_skb+0x1ef/0x230 net/core/skbuff.c:634 [<ffffffff84606e59>] alloc_skb include/linux/skbuff.h:1289 [inline] [<ffffffff84606e59>] kcm_sendmsg+0x269/0x1050 net/kcm/kcmsock.c:815 [<ffffffff83e479c6>] sock_sendmsg_nosec net/socket.c:725 [inline] [<ffffffff83e479c6>] sock_sendmsg+0x56/0xb0 net/socket.c:748 [<ffffffff83e47f55>] ____sys_sendmsg+0x365/0x470 net/socket.c:2494 [<ffffffff83e4c389>] ___sys_sendmsg+0xc9/0x130 net/socket.c:2548 [<ffffffff83e4c536>] __sys_sendmsg+0xa6/0x120 net/socket.c:2577 [<ffffffff84ad7bb8>] do_syscall_x64 arch/x86/entry/common.c:50 [inline] [<ffffffff84ad7bb8>] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 [<ffffffff84c0008b>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
In kcm_sendmsg(), kcm_tx_msg(head)->last_skb is used as a cursor to append newly allocated skbs to 'head'. If some bytes are copied, an error occurred, and jumped to out_error label, 'last_skb' is left unmodified. A later kcm_sendmsg() will use an obsoleted 'last_skb' reference, corrupting the 'head' frag_list and causing the leak.
This patch fixes this issue by properly updating the last allocated skb in 'last_skb'.
References
- https://www.suse.com/security/cve/CVE-2023-54112.html
- https://bugzilla.suse.com/1256354
- https://git.kernel.org/stable/c/16989de75497574b5fafd174c0c233d5a86858b7
- https://git.kernel.org/stable/c/33db24ad811b3576a0c2f8862506763f2be925b0
- https://git.kernel.org/stable/c/479c71cda14b3c3a6515773faa39055333eaa2b7
- https://git.kernel.org/stable/c/5e5554389397e98fafb9efe395d8b4830dd5f042
- https://git.kernel.org/stable/c/8dc7eb757b1652b82725f32e0c89a1e9f6c0e13b
- https://git.kernel.org/stable/c/97275339c34cfbccd65e87bc38fd910ae66c48ba
- https://git.kernel.org/stable/c/af8085e0fc3207ecbf8b9e7a635c790e36d058c6
- https://git.kernel.org/stable/c/c821a88bd720b0046433173185fd841a100d44ad