Tracker / CVE-2026-31499
CVE-2026-31499
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del() l2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer and id_addr_timer while holding conn->lock. However, the work functions l2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire conn->lock, creating a potential AB-BA deadlock if the work is already executing when l2cap_conn_del() takes the lock. Move the work cancellations before acquiring conn->lock and use disable_delayed_work_sync() to additionally prevent the works from being rearmed after cancellation, consistent with the pattern used in hci_conn_del().
Affected products and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 6.12.20 → 6.13 |
| linux | linux_kernel · 6.13.8 → 6.14 |
| linux | linux_kernel · 6.14.1 → 6.18.21 |
| linux | linux_kernel · 6.19 → 6.19.11 |
| linux | linux_kernel · 6.6.84 → 6.7 |
Analysis
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