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

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Summary

CVECVE-2021-47211
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-04-10 19:15:48 UTC
Updated2026-06-19 13:16:18 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.002250000 probability, percentile 0.129610000 (date 2026-06-24)

Problem Types: CWE-476

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 1dc669fed61a4ec4270a89e5fb3535802cc45668 3455984b16eeb6914caf8b59498ef24fcc1f0a78 git Not specified
CNA Linux Linux affected 1dc669fed61a4ec4270a89e5fb3535802cc45668 58fa50de595f152900594c28ec9915c169643739 git Not specified
CNA Linux Linux affected 1dc669fed61a4ec4270a89e5fb3535802cc45668 b97053df0f04747c3c1e021ecbe99db675342954 git Not specified
CNA Linux Linux affected 3.10 Not specified
CNA Linux Linux unaffected 3.10 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.5 5.15.* semver Not specified
CNA Linux Linux unaffected 5.16 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/3455984b16eeb6914caf8b59498ef24fcc1f0a78 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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