CVE-2024-26731
- Source
- https://cve.org/CVERecord?id=CVE-2024-26731
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26731.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2024-26731
- Downstream
BELL (1)
DEBIAN (1)
UBUNTU (1)
- Related
- Published
- 2024-04-03T17:00:18Z
- Modified
- 2026-10-08T02:48:19Z
- Severity
-
- 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
- Summary
- bpf, sockmap: Fix NULL pointer dereference in sk_psock_verdict_data_ready()
- Details
-
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: 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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26731.json" }- References
-
- 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
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26731.json
- https://nvd.nist.gov/vuln/detail/CVE-2024-26731
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddd628fc697ee59b76bd3877c4bd13f07ccc3776fFixed4588b13abcbd561ec67f5b3c1cb2eff690990a54
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6df7f764cd3cf5a03a4a47b23be47e57e41fcd85Fixed9b099ed46dcaf1403c531ff02c3d7400fa37fa26Fixedd61608a4e394f23e0dca099df9eb8e555453d949Fixed4cd12c6065dfcdeba10f49949bffcf383b3952d8
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.1.32Fixed6.1.80
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.3.6Fixed6.4
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedd3cbd7c571446a876aefd8320500300b2c951c58