CVE-2025-21911

Summary

CVE-2025-21911 is a vulnerability in the Linux kernel that involved deadlocks during fence release processing in the drm/imagination driver. This issue arose due to scheduler queue fence release processing being performed within the release function itself. The result was a potential deadlock scenario where a task attempted to acquire a lock while already holding it, leading to a warning message and a possible system hang. To address this issue, the fix involves performing fence release processing on a workqueue instead of within the release function itself. This change helps prevent the deadlocks and ensures the smooth operation of the Linux kernel.

Prevent cyber attacks with Recorded Future by prioritizing and patching critical vulnerabilities being exploited by threat actors targeting your industry. Book your demo to learn more.