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CVE-2026-31499

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…

Published Apr 22, 2026CWE-667EPSS 0.09%

Overview

CVE-2026-31499 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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().

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608Refgit.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7Refgit.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66Refgit.kernel.org/stable/c/f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31499?

CVE-2026-31499 is a medium-severity vulnerability. It was published on April 22, 2026 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2026-31499?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31499?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-31499?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31499 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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