What happened
In the Linux kernel, the following vulnerability has been resolved: ALSA: pcxhr: initialize mutexes before requesting threaded IRQ pcxhr_probe() requests pcxhr_threaded_irq() before initializing mgr->lock, even though the threaded handler takes that mutex. Initialize the manager locks before request_threaded_irq() so an early interrupt cannot run against uninitialized mutex state during probe.
Affected versions
Linux: 9bef72bdb26e291d6dffb04768741a0e49582666 through before c069b3cfd753d6688ea0271c43553631ab38ce10 (git); 9bef72bdb26e291d6dffb04768741a0e49582666 through before 7ef9ad82d95dd3c74570d80a689a0570fbc7539e (git); 9bef72bdb26e291d6dffb04768741a0e49582666 through before 7cf280fbef5db6310e1b32074c8c34d1ba459796 (git); 9bef72bdb26e291d6dffb04768741a0e49582666 through before 6c97817e20598e5473094e0e38d1f51f1cf4dfff (git); 3.18 Fixed: See vendor advisory.
Why it matters
Review the vendor advisory and exposure of the affected product to determine operational impact.
Detection & mitigation
- Apply vendor-provided updates or mitigations.
- Review affected product exposure and access logs.
Public PoC references
No public PoC reference has passed the current publication threshold.