CVE-2026-53071

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().

CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0015

Probability of exploitation

0.04%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-414 CWE-414

References

Other References

https://git.kernel.org/stable/c/0ccd75c51f620374086f359e906917676e699a1c https://git.kernel.org/stable/c/330b20ec97916961ee0e6c29c06bc0fa7c96e64c https://git.kernel.org/stable/c/42776497cdbc9a665b384a6dcb85f0d4bd927eab https://git.kernel.org/stable/c/5501d055a1ce3c747141e3955ba8cf034d193f3e https://git.kernel.org/stable/c/77a853aec710b2fdf41fa298ea3cbc9a4358f917 https://git.kernel.org/stable/c/96dca51715d86559ed6ed8028e5445cecb80f3ae https://git.kernel.org/stable/c/dc89961b76f12aff47124c1df4bdb32a080f4d0c https://git.kernel.org/stable/c/fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14 https://access.redhat.com/security/cve/CVE-2026-53071 https://bugzilla.redhat.com/show_bug.cgi?id=2492458

Frequently Asked Questions

What is CVE-2026-53071? +

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(). It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-53071? +

CVE-2026-53071 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0015, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-53071? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2025-54510

A missing lock verification in AMD Secure Processor (ASP) firmware may permit a locally authenticated attacker with administrative privileges to …

CVE-2026-54906 9.8

concurrent-ruby is a modern concurrency tools for Ruby. Prior to 1.3.7, Concurrent::ReadWriteLock#release_write_lock does not verify that the calling thread acquired …

CVE-2025-54625 6.7

Race condition vulnerability in the kernel file system module. Impact: Successful exploitation of this vulnerability may affect availability.

CVE-2023-5447 5.5

Missing lock check in SynHsaService may create a use-after-free condition which causes abnormal termination of the service, resulting in denial …