CVE-2021-47211

MEDIUM5.5

ALSA: usb-audio: fix null pointer dereference on pointer cs_desc

Published Apr 10, 2024

Modified 1 months ago

Details

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.

References

WEBhttps://git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739 WEBhttps://git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954 ADVISORYhttps://www.cve.org/CVERecord?id=CVE-2021-47211

CVSS Analysis

CVSS v3.1

5.5

Exploitability

Attack Vector

LocalAV:L

Attack Complexity

LowAC:L

Privileges Required

LowPR:L

User Interaction

NoneUI:N

Scope

UnchangedS:U

Impact

Confidentiality

NoneC:N

Integrity

NoneI:N

Availability

HighA:H

5.5/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Ecosystems

Timeline

PublishedApr 10, 2024

ModifiedDec 18, 2025