CVE-2026-31499
MEDIUM
MEDIUM
Priority: 0.01
BB Relevance:
36/100
Published: 2026-04-22
Modified: 2026-11-11
First seen: 2026-11-05
Status: active
Attack Surface
Low Complexity
No Interaction
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
Low
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
Description
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().
Weakness Classification (1)
Affected Software (19)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | f87271d21dd4ee83857ca11b94e7b4952749bbae < f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da |
| Linux | Linux | ab4eedb790cae44313759b50fe47da285e2519d5 < 3f26ecbd9cde621dd94be7ef252c7210b965a5c7 |
| Linux | Linux | ab4eedb790cae44313759b50fe47da285e2519d5 < d008460de352e534f6721de829b093368564ec66 |
| Linux | Linux | ab4eedb790cae44313759b50fe47da285e2519d5 < 00fdebbbc557a2fc21321ff2eaa22fd70c078608 |
| Linux | Linux | efc30877bd4bc85fefe98d80af60fafc86e5775e |
| Linux | Linux | 18ab6b6078fa8191ca30a3065d57bf35d5635761 |
| Linux | Linux | 6.12.20 < 6.12.88 |
| Linux | Linux | 6.6.84 < 6.7 |
| Linux | Linux | 6.13.8 < 6.14 |
| Linux | Linux | 6.14 |
| linux | linux_kernel | 6.6.84 – 6.7 |
| linux | linux_kernel | 6.14 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |
| linux | linux_kernel | 7.0 |