Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected f87271d21dd4ee83857ca11b94e7b4952749bbae before f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da; affected ab4eedb790cae44313759b50fe47da285e2519d5 before 3f26ecbd9cde621dd94be7ef252c7210b965a5c7; affected ab4eedb790cae44313759b50fe47da285e2519d5 before d008460de352e534f6721de829b093368564ec66; affected ab4eedb790cae44313759b50fe47da285e2519d5 before 00fdebbbc557a2fc21321ff2eaa22fd70c078608; affected efc30877bd4bc85fefe98d80af60fafc86e5775e; affected 18ab6b6078fa8191ca30a3065d57bf35d5635761; affected 6.12.20 before 6.12.88; affected 6.6.84 before 6.7; affected 6.13.8 before 6.14 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.12.88 through 6.12.*; unaffected 6.18.21 through 6.18.*; unaffected 6.19.11 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.