Answer in brief
CVE-2021-47211 records a Medium severity (CVSS 5.5) vulnerability in ALSA: usb-audio: fix null pointer dereference on pointer cs_desc. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1dc669fed61a4ec4270a89e5fb3535802cc45668 <3455984b16eeb6914caf8b59498ef24fcc1f0a78 || >=1dc669fed61a4ec4270a89e5fb3535802cc45668 <58fa50de595f152900594c28ec9915c169643739 || >=1dc669fed61a4ec4270a89e5fb3535802cc45668 <b97053df0f04747c3c1e021ecbe99db675342954 | 3455984b16eeb6914caf8b59498ef24fcc1f0a78, 58fa50de595f152900594c28ec9915c169643739, b97053df0f04747c3c1e021ecbe99db675342954 |
| Linux/Linuxgeneric | 3.10 | Not reported |
Published upstream
Apr 10, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2021-47211 records a Medium severity (CVSS 5.5) vulnerability in ALSA: usb-audio: fix null pointer dereference on pointer cs_desc. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1dc669fed61a4ec4270a89e5fb3535802cc45668 <3455984b16eeb6914caf8b59498ef24fcc1f0a78 || >=1dc669fed61a4ec4270a89e5fb3535802cc45668 <58fa50de595f152900594c28ec9915c169643739 || >=1dc669fed61a4ec4270a89e5fb3535802cc45668 <b97053df0f04747c3c1e021ecbe99db675342954 | 3455984b16eeb6914caf8b59498ef24fcc1f0a78, 58fa50de595f152900594c28ec9915c169643739, b97053df0f04747c3c1e021ecbe99db675342954 |
| Linux/Linuxgeneric | 3.10 | Not reported |
Published upstream
Apr 10, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
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.
Quoted source text, attributed separately from HOL analysis.