CVE-2021-47211

MEDIUM

Linux Kernel < 5.15.5 - Null Pointer Dereference in ALSA USB Audio Clock Source Descriptor

Title source: llm

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.

References (3)

Core 3

Core References

https://git.kernel.org/stable/c/3455984b16eeb6914caf8b59498ef24fcc1f0a78

Patch

https://git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739

Patch

https://git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954

Scores

CVSS v3 5.5

EPSS 0.0022

EPSS Percentile 13.1%

Attack Vector LOCAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-476

Status published

Products (9)

Linux/Linux < 3.10

Linux/Linux 1dc669fed61a4ec4270a89e5fb3535802cc45668 - 3455984b16eeb6914caf8b59498ef24fcc1f0a78

Linux/Linux 1dc669fed61a4ec4270a89e5fb3535802cc45668 - 58fa50de595f152900594c28ec9915c169643739

Linux/Linux 1dc669fed61a4ec4270a89e5fb3535802cc45668 - b97053df0f04747c3c1e021ecbe99db675342954

Linux/Linux 3.10

Linux/Linux 5.10.259 - 5.10.*

Linux/Linux 5.15.5 - 5.15.*

Linux/Linux 5.16

linux/linux_kernel < 5.15.5

Published Apr 10, 2024

Tracked Since Feb 18, 2026