CVE-2024-26731 Affecting cluster-md-kmp-default package, versions <6.4.0-150600.23.7.3
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Test your applications- Snyk ID SNYK-SLES156-CLUSTERMDKMPDEFAULT-7713277
- published 20 Aug 2024
- disclosed 25 Jun 2024
Introduced: 25 Jun 2024
CVE-2024-26731 Open this link in a new tabHow to fix?
Upgrade SLES:15.6
cluster-md-kmp-default
to version 6.4.0-150600.23.7.3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream cluster-md-kmp-default
package and not the cluster-md-kmp-default
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:
bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()
syzbot reported the following NULL pointer dereference issue [1]:
BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] RIP: 0010:0x0 [...] Call Trace: <TASK> sk_psock_verdict_data_ready+0x232/0x340 net/core/skmsg.c:1230 unix_stream_sendmsg+0x9b4/0x1230 net/unix/af_unix.c:2293 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x221/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2584 ___sys_sendmsg net/socket.c:2638 [inline] __sys_sendmsg+0x2b0/0x3a0 net/socket.c:2667 do_syscall_64+0xf9/0x240 entry_SYSCALL_64_after_hwframe+0x6f/0x77
If sk_psock_verdict_data_ready() and sk_psock_stop_verdict() are called concurrently, psock->saved_data_ready can be NULL, causing the above issue.
This patch fixes this issue by calling the appropriate data ready function using the sk_psock_data_ready() helper and protecting it from concurrency with sk->sk_callback_lock.
References
- https://www.suse.com/security/cve/CVE-2024-26731.html
- https://bugzilla.suse.com/1222371
- https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54
- https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8
- https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26
- https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949