Answer in brief
CVE-2026-74535 records a High severity (CVSS 8.8) vulnerability in Bluetooth: ISO: avoid deadlocks in iso_sock_timeout. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=a58d0f5dac322e16cc75334d000666512341bde5 <16d89a63e08280abeef7218970a3bbd7ca62b021 || >=dc26097bdb864a0d5955b9a25e43376ffc1af99b <82e982f54f962f72646868ddbb2c3bd9ea178568 || >=dc26097bdb864a0d5955b9a25e43376ffc1af99b <3c3d5f85db80145636bb991a6005e2760012b985 || >=dc26097bdb864a0d5955b9a25e43376ffc1af99b <200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43 || f53e7489273dc2bb307bf50f319b3762d45534f0 || >=6.12.2 <6.12.103 || >=6.11.11 <6.12 | 16d89a63e08280abeef7218970a3bbd7ca62b021, 82e982f54f962f72646868ddbb2c3bd9ea178568, 3c3d5f85db80145636bb991a6005e2760012b985, 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43, 6.12.103, 6.12 |
| Linux/Linuxgeneric | 6.13 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 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: ISO: avoid deadlocks in iso_sock_timeout iso_sock_timeout() takes lock_sock, so sync disabling the timer while holding that lock may deadlock. iso_sock_timeout() may also run concurrently with iso_conn_del(), which leads to UAF [Task 1] [Task hdev->workqueue] iso_sock_timeout iso_conn_del iso_conn_hold_unless_zero iso_chan_del `------------> iso_conn_put caller frees hcon iso_conn_put iso_conn_free conn->hcon->iso_data = NULL; /* UAF */ Fix the deadlock by removing the disable from the lock_sock sections. Move the timer from iso_conn to iso_pinfo to decouple it from iso_conn which may need to be freed in lock_sock section. Convert some of the clear_timer to disable_timer.
Quoted source text, attributed separately from HOL analysis.