Vulnerability 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().
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.6.84, < 6.7 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608Patch
- https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7Patch
- https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66Patch
- https://git.kernel.org/stable/c/f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da
FAQ
What is CVE-2026-31499?
CVE-2026-31499 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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_ad...
How severe is CVE-2026-31499?
CVE-2026-31499 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31499?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.