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CVE-2024-36891

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: maple_tree: fix mas_empty_area_rev() null pointer dereference Currently the code calls mas_start() followed by mas_data_end() i…

Published May 30, 2024CWE-476EPSS 0.23%

Overview

CVE-2024-36891 is a medium-severity vulnerability. It was published on May 30, 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:

maple_tree: fix mas_empty_area_rev() null pointer dereference

Currently the code calls mas_start() followed by mas_data_end() if the

maple state is MA_START, but mas_start() may return with the maple state

node == NULL. This will lead to a null pointer dereference when checking

information in the NULL node, which is done in mas_data_end().

Avoid setting the offset if there is no node by waiting until after the

maple state is checked for an empty or single entry state.

A user could trigger the events to cause a kernel oops by unmapping all

vmas to produce an empty maple tree, then mapping a vma that would cause

the scenario described above.

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/6c9c7c1e63b198a8b979ad963eb21410f10ccb00Refgit.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415Refgit.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cfRefgit.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486ccRefgit.kernel.org/stable/c/6c9c7c1e63b198a8b979ad963eb21410f10ccb00Refgit.kernel.org/stable/c/883e5d542bbdddbddeba60250cb482baf3ae2415Refgit.kernel.org/stable/c/955a923d2809803980ff574270f81510112be9cfRefgit.kernel.org/stable/c/f3956791cf526540addd3295e4c1e0f0442486cc

How CyberStrike helps

Frequently asked questions

What is CVE-2024-36891?

CVE-2024-36891 is a medium-severity vulnerability. It was published on May 30, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-36891?

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-2024-36891?

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-2024-36891?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-36891 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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