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CVE-2026-53071

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holdi…

Published Jun 24, 2026CWE-667EPSS 0.43%

Overview

CVE-2026-53071 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding

l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file

acquires the lock first. A remote BLE device can send a crafted

L2CAP ECRED reconfiguration response to corrupt the channel list

while another thread is iterating it.

Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(),

and l2cap_chan_unlock() and l2cap_chan_put() after, matching the

pattern used in l2cap_ecred_conn_rsp() and l2cap_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/0ccd75c51f620374086f359e906917676e699a1cRefgit.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64cRefgit.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eabRefgit.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3eRefgit.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917Refgit.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3aeRefgit.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0cRefgit.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14Refaccess.redhat.com/errata/RHSA-2026:42550Refaccess.redhat.com/errata/RHSA-2026:42552

How CyberStrike helps

Frequently asked questions

What is CVE-2026-53071?

CVE-2026-53071 is a high-severity vulnerability. It was published on June 24, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-53071?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-53071?

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-2026-53071?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-53071 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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