Answer in brief
CVE-2026-74300 records a Unknown severity vulnerability in Bluetooth: hci: validate codec capability element length. 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.
A CVSS score is not reported in the current record. 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 | >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <fc97fc8cf7f53fd3619db63e09050d20a3a0c4b1 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <290b36f9d1eb9b2f72b40d826f26b4a182ab15f7 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <f2ad01f55e07f9531efcea736087e6b8658a3440 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <ec4d352747a62c1082f16c11a74b37d6eb85a5a3 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <4bc16db0f11918e07edf9fdcda4a30cf4c9df45c || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <c38fbcdc407925c7088f7e5f11c1fff73d2d35a2 | fc97fc8cf7f53fd3619db63e09050d20a3a0c4b1, 290b36f9d1eb9b2f72b40d826f26b4a182ab15f7, f2ad01f55e07f9531efcea736087e6b8658a3440, ec4d352747a62c1082f16c11a74b37d6eb85a5a3, 4bc16db0f11918e07edf9fdcda4a30cf4c9df45c, c38fbcdc407925c7088f7e5f11c1fff73d2d35a2 |
| Linux/Linuxgeneric | 5.16 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci: validate codec capability element length Read Local Codec Capabilities returns a sequence of capability elements. Each element starts with a one-byte length followed by that many payload bytes. hci_read_codec_capabilities() checks that the skb contains the length byte, but then validates only caps->len against the remaining skb length. A malformed controller response with one remaining byte and caps->len set to one passes that check even though the element needs two bytes. The parser then records a two-byte capability and copies one byte beyond the advertised response payload into the codec list. Validate the full element size, including the length byte, before adding it to the accumulated capability length. This preserves all well-formed capability elements and drops only truncated controller responses.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-74300 records a Unknown severity vulnerability in Bluetooth: hci: validate codec capability element length. 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.
A CVSS score is not reported in the current record. 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 | >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <fc97fc8cf7f53fd3619db63e09050d20a3a0c4b1 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <290b36f9d1eb9b2f72b40d826f26b4a182ab15f7 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <f2ad01f55e07f9531efcea736087e6b8658a3440 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <ec4d352747a62c1082f16c11a74b37d6eb85a5a3 || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <4bc16db0f11918e07edf9fdcda4a30cf4c9df45c || >=8961987f3f5fa2f2618e72304d013c8dd5e604a6 <c38fbcdc407925c7088f7e5f11c1fff73d2d35a2 | fc97fc8cf7f53fd3619db63e09050d20a3a0c4b1, 290b36f9d1eb9b2f72b40d826f26b4a182ab15f7, f2ad01f55e07f9531efcea736087e6b8658a3440, ec4d352747a62c1082f16c11a74b37d6eb85a5a3, 4bc16db0f11918e07edf9fdcda4a30cf4c9df45c, c38fbcdc407925c7088f7e5f11c1fff73d2d35a2 |
| Linux/Linuxgeneric | 5.16 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci: validate codec capability element length Read Local Codec Capabilities returns a sequence of capability elements. Each element starts with a one-byte length followed by that many payload bytes. hci_read_codec_capabilities() checks that the skb contains the length byte, but then validates only caps->len against the remaining skb length. A malformed controller response with one remaining byte and caps->len set to one passes that check even though the element needs two bytes. The parser then records a two-byte capability and copies one byte beyond the advertised response payload into the codec list. Validate the full element size, including the length byte, before adding it to the accumulated capability length. This preserves all well-formed capability elements and drops only truncated controller responses.
Quoted source text, attributed separately from HOL analysis.