CVE-2021-47281

A vulnerability was found in the Linux kernel's ALSA sequencer, where the snd_seq_timer_open() function fails to properly manage concurrent access to timer instances, which could allow multiple calls to override the timer, leading to a potential use-after-free issue if a timer continues running after its associated queue is closed.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.