What is CVE-2024-40951?

CVE-2024-40951 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476), affecting Linux kernel versions from 6.6 onward and patched in 6.6.36, 6.9.7 and 6.10. CVE-2024-40951 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-40951?

CVE-2024-40951 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-40951?

Yes, CVE-2024-40951 has been patched. Fixed versions include 6.6.36, 6.9.7 and 6.10. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-40951 actively exploited?

CVE-2024-40951 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-2024-40951

Medium

In the Linux kernel, the following vulnerability has been resolved: ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger() bdev->bd_super has been removed and commit 8887b94d9322 change the usage from bdev->bd_super to b_assoc_map->host->i_sb. Since ocfs2 hasn't set bh->b_assoc_map, it will trigger NULL pointer dereference when calling into ocfs2_abort_trigger(). Actually this was pointed out in history, see commit 74e364ad1b13. But I've made a mistake when reviewing commit 8887b94d9322 and then re-introduce this regression. Since we cannot revive bdev in buffer head, so fix this issue by initializing all types of ocfs2 triggers when fill super, and then get the specific ocfs2 trigger from ocfs2_caching_info when access journal. [[email protected]: v2]

Package Linux Kernel

Published 2024-07-12

Last modified 2025-04-16

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-476

CVE-2024-40951 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 6.6 and later are affected. Fixed in 6.6.36, 6.9.7, 6.10 and their respective stable series.

Affected from

≥ 6.6

Fixed in

✓ 6.6.36 6.6.x ✓ 6.9.7 6.9.x ✓ 6.10

References

3 total

Kernel Git
https://git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734ce

Patch
Kernel Git
https://git.kernel.org/stable/c/685d03c3795378fca6a1b3d43581f7f1a3fc095f

Patch
Kernel Git
https://git.kernel.org/stable/c/eb63357ef229fae061ce7ce2839d558681c42f1a

Patch

Details

CVE ID CVE-2024-40951

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-07-12

Modified 2025-04-16

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-40951?

CVE-2024-40951 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . It affects Linux kernel versions from 6.6 onward and has been patched in 6.6.36, 6.9.7 and 6.10. CVE-2024-40951 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-40951?

CVE-2024-40951 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-40951?

Yes. CVE-2024-40951 has been patched. Fixed versions include 6.6.36, 6.9.7 and 6.10. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-40951 actively exploited?

No. CVE-2024-40951 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.