CVE-2021-47211

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 Metrics

• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.22%• Percentile: 13%

Techniques & Countermeasures

• CWE-476•NULL Pointer Dereference

  The product dereferences a pointer that it expects to be valid but is NULL.

Affected Systems

• linux•linux

  ≥ 1dc669fed61a4ec4270a89e5fb3535802cc45668, < 3455984b16eeb6914caf8b59498ef24fcc1f0a78 | ≥ 1dc669fed61a4ec4270a89e5fb3535802cc45668, < 58fa50de595f152900594c28ec9915c169643739 | ≥ 1dc669fed61a4ec4270a89e5fb3535802cc45668, < b97053df0f04747c3c1e021ecbe99db675342954 | 3.10

• linux•linux kernel

  < 5.15.5

References (3)

• https://git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739
• https://git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954
• https://git.kernel.org/stable/c/3455984b16eeb6914caf8b59498ef24fcc1f0a78