CVE-2022-49305

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

Description A deadlock issue exists in the Linux kernel, specifically in the ieee80211 beacons stop() function. This occurs when two threads attempt to access the ieee->beacon lock simultaneously, causing the function to block indefinitely. The deadlock is a result of the del timer sync() call waiting for a timer to stop while holding the lock, and the timer handler also requiring the same lock. The issue is resolved by extracting the del timer sync() call from the protection of spin lock irqsave(), allowing the timer handler to obtain the necessary lock.

Recommendations For the Linux kernel, apply the patch that extracts del timer sync() from the protection of spin lock irqsave() to resolve the deadlock issue in ieee80211 beacons stop().