A use-after-free flaw was found in the Linux kernel’s sound subsystem in the way a user triggers concurrent calls of PCM hw_params. The hw_free ioctls or similar race condition happens inside ALSA PCM for other ioctls. This flaw allows a local user to crash or potentially escalate their privileges on the system.
https://lore.kernel.org/lkml/[email protected]/T/#m1d3b791b815556012c6be92f1c4a7086b854f7f3
https://bugzilla.redhat.com/show_bug.cgi?id=2066706
https://www.debian.org/security/2022/dsa-5127
Source: MITRE
Published: 2022-04-29
Updated: 2022-12-14
Type: CWE-362
Base Score: 6.9
Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C
Impact Score: 10
Exploitability Score: 3.4
Severity: MEDIUM
Base Score: 7
Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Impact Score: 5.9
Exploitability Score: 1
Severity: HIGH