CVE-2026-74535
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.
How to fix
- Linux Linux16d89a63e08280abeef7218970a3bbd7ca62b021, 82e982f54f962f72646868ddbb2c3bd9ea178568, 3c3d5f85db80145636bb991a6005e2760012b985, 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43, 6.12.103, 6.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | a58d0f5dac322e16cc75334d000666512341bde5 ≤ v < 16d89a63e08280abeef7218970a3bbd7ca62b021, dc26097bdb864a0d5955b9a25e43376ffc1af99b ≤ v < 82e982f54f962f72646868ddbb2c3bd9ea178568, dc26097bdb864a0d5955b9a25e43376ffc1af99b ≤ v < 3c3d5f85db80145636bb991a6005e2760012b985, dc26097bdb864a0d5955b9a25e43376ffc1af99b ≤ v < 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43, f53e7489273dc2bb307bf50f319b3762d45534f0, 6.12.2 ≤ v < 6.12.103, 6.11.11 ≤ v < 6.12, 6.13 | 16d89a63e08280abeef7218970a3bbd7ca62b021, 82e982f54f962f72646868ddbb2c3bd9ea178568, 3c3d5f85db80145636bb991a6005e2760012b985, 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43, 6.12.103, 6.12 |
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