What is CVE-2024-26731?

CVE-2024-26731 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 6.1.32 onward and patched in 6.1.80, 6.6.19, 6.7.7 and others. CVE-2024-26731 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26731?

CVE-2024-26731 has a CVSS score of 5.3 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Is there a patch available for CVE-2024-26731?

Yes, CVE-2024-26731 has been patched. Fixed versions include 6.1.80, 6.6.19, 6.7.7 and others. If you are running Linux kernel 6.1.32 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-26731 actively exploited?

CVE-2024-26731 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2024-26731

Medium

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.

Package Linux Kernel

Published 2024-04-03

Last modified 2025-04-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.3

out of 10

Medium

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

Low

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Weakness type

CWE-476

CVE-2024-26731 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.1.32, 6.3.6, 6.4 and later are affected. Fixed in 6.1.80, 6.6.19, 6.7.7, 6.8 and their respective stable series.

Affected from

≥ 6.1.32 ≥ 6.3.6 ≥ 6.4

Fixed in

✓ 6.1.80 6.1.x ✓ 6.6.19 6.6.x ✓ 6.7.7 6.7.x ✓ 6.8

References

4 total

Kernel Git
https://git.kernel.org/stable/c/4588b13abcbd561ec67f5b3c1cb2eff690990a54

Patch
Kernel Git
https://git.kernel.org/stable/c/4cd12c6065dfcdeba10f49949bffcf383b3952d8

Patch
Kernel Git
https://git.kernel.org/stable/c/9b099ed46dcaf1403c531ff02c3d7400fa37fa26

Patch
Kernel Git
https://git.kernel.org/stable/c/d61608a4e394f23e0dca099df9eb8e555453d949

Patch

Details

CVE ID CVE-2024-26731

Severity Medium

CVSS score 5.3 / 10

CVSS version 3.1

Published 2024-04-03

Modified 2025-04-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-26731?

CVE-2024-26731 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.3 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 6.1.32 onward and has been patched in 6.1.80, 6.6.19, 6.7.7 and others. CVE-2024-26731 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26731?

CVE-2024-26731 has a CVSS score of 5.3 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.
Is there a patch available for CVE-2024-26731?

Yes. CVE-2024-26731 has been patched. Fixed versions include 6.1.80, 6.6.19, 6.7.7 and others. If you are running Linux kernel 6.1.32 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-26731 actively exploited?

No. CVE-2024-26731 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.