Description
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.
Metrics
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= a58d0f5dac322e16cc75334d000666512341bde5, < 16d89a63e08280abeef7218970a3bbd7ca62b021; >= dc26097bdb864a0d5955b9a25e43376ffc1af99b, < 82e982f54f962f72646868ddbb2c3bd9ea178568; >= dc26097bdb864a0d5955b9a25e43376ffc1af99b, < 3c3d5f85db80145636bb991a6005e2760012b985; >= dc26097bdb864a0d5955b9a25e43376ffc1af99b, < 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43; f53e7489273dc2bb307bf50f319b3762d45534f0; >= 6.12.2, < 6.12.103; >= 6.11.11, < 6.12 |
| Linux | Linux | 6.13 |
References
Timeline
- Published
- Aug 15, 2026
- Last modified
- Oct 16, 2026
- NVD status
- Received