CVE-2024-26731
"Linux kernel BPF Sockmap NULL Pointer Dereference Vulnerability"
Description
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.
INFO
Published Date :
April 3, 2024, 5:15 p.m.
Last Modified :
April 3, 2025, 5:09 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
Yes !
Impact Score :
1.4
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2024-26731.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2024-26731 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-26731 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Apr. 03, 2025
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.7 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.1.32 up to (excluding) 6.1.80 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.3.6 up to (excluding) 6.6.19 Added Reference Type CVE: https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26 Types: Patch Added Reference Type CVE: https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949 Types: Patch Added Reference Type kernel.org: https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949 Types: Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54 Added Reference https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8 Added Reference https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26 Added Reference https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Nov. 06, 2024
Action Type Old Value New Value Added CWE CISA-ADP CWE-476 Added CVSS V3.1 CISA-ADP AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 29, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Apr. 03, 2024
Action Type Old Value New Value Added Description 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. Added Reference kernel.org https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-26731 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-26731
weaknesses.