CVE-2026-64178 (CVSS 8.8)

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: Fix UAF read of dev->name bnep_add_connection() needs to keep holding the bnep_session_sem while reading dev->name (just like bnep_get_connlist() does); otherwise the bnep_session() thread can concurrently free the net_device, which can for example be triggered by a concurrent bnep_del_connection(). (This UAF is fairly uninteresting from a security perspective; calling bnep_add_connection() requires passing a capable(CAP_NET_ADMIN) check. It also requires completely tearing down a netdev during a fairly tight race window.)

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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

0.0025

Probability of exploitation

0.16%

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.

References

Other References

https://git.kernel.org/stable/c/4907596f25b1720fa948371ac5f6c1f8da10a5bc https://git.kernel.org/stable/c/5506aec795135cdd4cbf4e845929155663b25055 https://git.kernel.org/stable/c/59e932ded949fa6f0340bf7c6d7818f962fa4fd2 https://git.kernel.org/stable/c/915a92182e2cda9cd7d2479020a44c6eda986f7c https://git.kernel.org/stable/c/a75bbcb10cb21acc169b785e9804f57d97873a9c https://git.kernel.org/stable/c/b21805258d7e926adfd455fc820a447b90da3b82 https://git.kernel.org/stable/c/e7578529b97e5d4e439cf8f3e637c2303015338f https://git.kernel.org/stable/c/fe69f634b076ae3ca81c5a5b845d9bba527036f7

Frequently Asked Questions

What is CVE-2026-64178? +

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: bnep: Fix UAF read of dev->name bnep_add_connection() needs to keep holding the bnep_session_sem while reading dev->name (just like bnep_get_connlist() does); otherwise the bnep_session() thread can concurrently free the net_device, which can for example be triggered by a concurrent bnep_del_connection(). (This UAF is fairly uninteresting from a security perspective; calling bnep_add_connection() requires passing a capable(CAP_NET_ADMIN) check. It also requires completely tearing down a netdev during a fairly tight race window.) It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-64178? +

CVE-2026-64178 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 0.0025, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-64178? +

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.

CVE-2026-64178