CVE-2021-47211
kernel: ALSA: usb-audio: fix null pointer dereference on pointer cs_desc
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 10, 2024
Updated · November 21, 2025
Description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: usb-audio: fix null pointer dereference on pointer cs_desc
The pointer cs_desc return from snd_usb_find_clock_source could be null, so there is a potential null pointer dereference issue. Fix this by adding a null check before dereference.
CVSS score applicability
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.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.4CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-476 · NULL Pointer Dereference