CVE-2024-26654

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a use-after-free bug in the ALSA subsystem of the Linux kernel. This bug occurs when the snd pcm substream is closing, and the aica channel is deallocated but can still be dereferenced in the worker thread. The reason for this is that del timer() returns directly, regardless of whether the timer handler is running or not, and the worker could be rescheduled in the timer handler. To mitigate this bug, the mod timer() function should be called conditionally in run spu dma(), and a PCM sync stop operation should be implemented to cancel both the timer and worker.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.