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CVE-2024-43864

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix CT entry update leaks of modify header context The cited commit allocates a new modify header to replace the old…

Published Aug 21, 2024CWE-416EPSS 0.47%

Overview

CVE-2024-43864 is a critical-severity vulnerability. It was published on August 21, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

net/mlx5e: Fix CT entry update leaks of modify header context

The cited commit allocates a new modify header to replace the old

one when updating CT entry. But if failed to allocate a new one, eg.

exceed the max number firmware can support, modify header will be

an error pointer that will trigger a panic when deallocating it. And

the old modify header point is copied to old attr. When the old

attr is freed, the old modify header is lost.

Fix it by restoring the old attr to attr when failed to allocate a

new modify header context. So when the CT entry is freed, the right

modify header context will be freed. And the panic of accessing

error pointer is also fixed.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

References

Refgit.kernel.org/stable/c/025f2b85a5e5a46df14ecf162c3c80a957a36d0bRefgit.kernel.org/stable/c/89064d09c56b44c668509bf793c410484f63f5adRefgit.kernel.org/stable/c/daab2cc17b6b6ab158566bba037e9551fd432b59

How CyberStrike helps

Frequently asked questions

What is CVE-2024-43864?

CVE-2024-43864 is a critical-severity vulnerability. It was published on August 21, 2024 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2024-43864?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2024-43864?

Check the references section for vendor advisories, patches, and mitigation guidance. 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.

How can CyberStrike help with CVE-2024-43864?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-43864 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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