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CVE-2026-74538

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: lock sk in iso_connect_ind Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the "ev3" part…

Published Aug 15, 2026EPSS 0.38%

Overview

CVE-2026-74538 is a high-severity vulnerability. It was published on August 15, 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: ISO: lock sk in iso_connect_ind

Accessing iso_pi(sk)->conn requires lock_sock, which is not taken in the

"ev3" part of iso_connect_ind. It may also be NULL if socket has

transitioned away from the LISTEN/CONNECT states before locking.

Fix by adding lock/release. Recheck hcon is valid after lock acquire

where needed.

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/4311fd6f429065a8ba208660360a895627a00cf3Refgit.kernel.org/stable/c/9bee7e476534f27e830658dad962d85da9edf6bfRefgit.kernel.org/stable/c/e8e9cff6d80eeec28dec4cf7cc18662986945391

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74538?

CVE-2026-74538 is a high-severity vulnerability. It was published on August 15, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-74538?

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-2026-74538?

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-2026-74538?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74538 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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