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CVE PROGRAM SOURCE RECORD8.8 High

CVE-2026-74535

Bluetooth: ISO: avoid deadlocks in iso_sock_timeout

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Status
Published
Published
Updated
Assigning organization
Linux

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • a58d0f5dac322e16cc75334d000666512341bde5 to < 16d89a63e08280abeef7218970a3bbd7ca62b021affected
  • dc26097bdb864a0d5955b9a25e43376ffc1af99b to < 82e982f54f962f72646868ddbb2c3bd9ea178568affected
  • dc26097bdb864a0d5955b9a25e43376ffc1af99b to < 3c3d5f85db80145636bb991a6005e2760012b985affected
  • dc26097bdb864a0d5955b9a25e43376ffc1af99b to < 200fa1629c57a3ca2b03d3ca63fd3a9bfd910c43affected
  • f53e7489273dc2bb307bf50f319b3762d45534f0affected
  • 6.12.2 to < 6.12.103affected
  • 6.11.11 to < 6.12affected

Linux Linux

Default version status: affected

  • 6.13affected
  • 0 to < 6.13unaffected
  • 6.12.103 to ≤ 6.12.*unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References