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CVE-2025-21849

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: drm/i915/gt: Use spin_lock_irqsave() in interruptible context spin_lock/unlock() functions used in interrupt contexts could res…

Published Mar 12, 2025CWE-667EPSS 0.18%

Overview

CVE-2025-21849 is a medium-severity vulnerability. It was published on March 12, 2025 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/i915/gt: Use spin_lock_irqsave() in interruptible context

spin_lock/unlock() functions used in interrupt contexts could

result in a deadlock, as seen in GitLab issue #13399,

which occurs when interrupt comes in while holding a lock.

Try to remedy the problem by saving irq state before spin lock

acquisition.

v2: add irqs' state save/restore calls to all locks/unlocks in

signal_irq_work() execution (Maciej)

v3: use with spin_lock_irqsave() in guc_lrc_desc_unpin() instead

of other lock/unlock calls and add Fixes and Cc tags (Tvrtko);

change title and commit message

(cherry picked from commit c088387ddd6482b40f21ccf23db1125e8fa4af7e)

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/2bf1f4c129db7a10920655b000f0292f1ee509c2Refgit.kernel.org/stable/c/47ae46ac5407646420e06b78e0dad331e56a4bb4Refgit.kernel.org/stable/c/e49477f7f78598295551d486ecc7f020d796432e

How CyberStrike helps

Frequently asked questions

What is CVE-2025-21849?

CVE-2025-21849 is a medium-severity vulnerability. It was published on March 12, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-21849?

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-2025-21849?

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-2025-21849?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-21849 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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