Answer in brief
CVE-2023-53374 records a High severity (CVSS 8.8) vulnerability in Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early. 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 8.8. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f <397d58007532644b35fad746da48c41161f32a57 || >=ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f <e94b898463a62b72a2a8b75dea8936bf4db78e00 || >=ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f <3344d318337d9dca928fd448e966557ec5063f85 || 75e35bd4b7935ceed2aacd82f55940e73bf0b63b || >=6.3.8 <6.4 | 397d58007532644b35fad746da48c41161f32a57, e94b898463a62b72a2a8b75dea8936bf4db78e00, 3344d318337d9dca928fd448e966557ec5063f85, 6.4 |
| Linux/Linuxgeneric | 6.4 | Not reported |
Published upstream
Sep 18, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early Not calling hci_(dis)connect_cfm before deleting conn referred to by a socket generally results to use-after-free. When cleaning up SCO connections when the parent ACL is deleted too early, use hci_conn_failed to do the connection cleanup properly. We also need to clean up ISO connections in a similar situation when connecting has started but LE Create CIS is not yet sent, so do it too here.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2023-53374 records a High severity (CVSS 8.8) vulnerability in Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early. 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 8.8. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc6:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:6.4:rc7:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f <397d58007532644b35fad746da48c41161f32a57 || >=ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f <e94b898463a62b72a2a8b75dea8936bf4db78e00 || >=ca1fd42e7dbfcb34890ffbf1f2f4b356776dab6f <3344d318337d9dca928fd448e966557ec5063f85 || 75e35bd4b7935ceed2aacd82f55940e73bf0b63b || >=6.3.8 <6.4 | 397d58007532644b35fad746da48c41161f32a57, e94b898463a62b72a2a8b75dea8936bf4db78e00, 3344d318337d9dca928fd448e966557ec5063f85, 6.4 |
| Linux/Linuxgeneric | 6.4 | Not reported |
Published upstream
Sep 18, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 4, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fail SCO/ISO via hci_conn_failed if ACL gone early Not calling hci_(dis)connect_cfm before deleting conn referred to by a socket generally results to use-after-free. When cleaning up SCO connections when the parent ACL is deleted too early, use hci_conn_failed to do the connection cleanup properly. We also need to clean up ISO connections in a similar situation when connecting has started but LE Create CIS is not yet sent, so do it too here.
Quoted source text, attributed separately from HOL analysis.