Linux Kernel Vulnerability in s390/vfio_ccw Driver

CVE-2026-80549

What is CVE-2026-80549?

An issue was identified in the s390/vfio_ccw driver of the Linux Kernel whereby resource cleanup for a device could occur while holding other locks due to asynchronous failures. This mismanagement could lead to potential complications in the lock sequence during operation. To address this, the cleanup process has been redesigned to run within a workqueue, ensuring that it executes independent of the current locking sequence, thus enhancing stability and security in handling device failures.

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