CVE-2024-40951

5.5 · MEDIUM

Published Jul 12, 2024 linux CWE-476 EPSS 0.24% (15th pctl) CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Overview

CVE-2024-40951 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 12, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical Description

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]

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

Vendor	Product	Versions	Status
linux	linux_kernel	>= 6.6, < 6.6.36	Affected

References

Ref git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734ce Ref git.kernel.org/stable/c/685d03c3795378fca6a1b3d43581f7f1a3fc095f Ref git.kernel.org/stable/c/eb63357ef229fae061ce7ce2839d558681c42f1a Ref git.kernel.org/stable/c/67bcecd780609f471260a8c83fb0ae15f27734ce Ref git.kernel.org/stable/c/685d03c3795378fca6a1b3d43581f7f1a3fc095f Ref git.kernel.org/stable/c/eb63357ef229fae061ce7ce2839d558681c42f1a

Frequently Asked Questions

What is CVE-2024-40951?

CVE-2024-40951 is a medium-severity vulnerability affecting linux linux_kernel. It was published on July 12, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-40951?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-40951?

How can CyberStrike help with CVE-2024-40951?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-40951 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

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