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CVE-2021-47211
ALSA: usb-audio: fix null pointer dereference on pointer cs_desc
Medium5.5EPSS 0.24%
- Published
- Updated
- Reserved
- Assigned by
- Linux
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.
Timeline
ID reserved
By Linux
Published
- 2 years later
· 2 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 85% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
- affected 1dc669fed61a4ec4270a89e5fb3535802cc45668 – < 3455984b16eeb6914caf8b59498ef24fcc1f0a78
- affected 1dc669fed61a4ec4270a89e5fb3535802cc45668 – < 58fa50de595f152900594c28ec9915c169643739
- affected 1dc669fed61a4ec4270a89e5fb3535802cc45668 – < b97053df0f04747c3c1e021ecbe99db675342954
- affected 3.10
- unaffected < 3.10
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.5 – ≤ 5.15.*
- unaffected 5.16 – ≤ *
References (3)
- https://git.kernel.org/stable/c/3455984b16eeb6914caf8b59498ef24fcc1f0a78 (opens in a new tab)
- https://git.kernel.org/stable/c/58fa50de595f152900594c28ec9915c169643739 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/b97053df0f04747c3c1e021ecbe99db675342954 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-47211)Record last updated .