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CVE-2024-44956

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/xe/preempt_fence: enlarge the fence critical section It is really easy to introduce subtle deadlocks in preempt_fence_work_…

Published Sep 4, 2024CWE-667EPSS 0.14%

Overview

CVE-2024-44956 is a medium-severity vulnerability. It was published on September 4, 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:

drm/xe/preempt_fence: enlarge the fence critical section

It is really easy to introduce subtle deadlocks in

preempt_fence_work_func() since we operate on single global ordered-wq

for signalling our preempt fences behind the scenes, so even though we

signal a particular fence, everything in the callback should be in the

fence critical section, since blocking in the callback will prevent

other published fences from signalling. If we enlarge the fence critical

section to cover the entire callback, then lockdep should be able to

understand this better, and complain if we grab a sensitive lock like

vm->lock, which is also held when waiting on preempt fences.

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/3cd1585e57908b6efcd967465ef7685f40b2a294Refgit.kernel.org/stable/c/458bb83119dfee5d14c677f7846dd9363817006f

How CyberStrike helps

Frequently asked questions

What is CVE-2024-44956?

CVE-2024-44956 is a medium-severity vulnerability. It was published on September 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-44956?

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-2024-44956?

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-2024-44956?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-44956 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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