CVE-2026-74535Bluetooth: ISO: avoid deadlocks in iso_sock_timeout
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from a58d0f5dac322e16cc75334d000666512341bde5 before 16d89a63e08280abeef7218970a3bbd7ca62b021; from dc26097bdb864a0d5955b9a25e43376ffc1af99b before 82e982f54f962f72646868ddbb2c3bd9ea178568; from dc26097bdb864a0d5955b9a25e43376ffc1af99b before 3c3d5f85db80145636bb991a6005e2760012b985; from dc26097bdb864a0d5955b9a25e43376ffc1af99b before 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43; f53e7489273dc2bb307bf50f319b3762d45534f0; from 6.12.2 before 6.12.103; from 6.11.11 before 6.12 | CNA record |
References
- https://git.kernel.org/stable/c/16d89a63e08280abeef7218970a3bbd7ca62b021
- https://git.kernel.org/stable/c/82e982f54f962f72646868ddbb2c3bd9ea178568
- https://git.kernel.org/stable/c/3c3d5f85db80145636bb991a6005e2760012b985
- https://git.kernel.org/stable/c/200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.