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CVE-2026-74537

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: hold sk properly in iso_conn_ready sk deref in iso_conn_ready must be done either under conn->lock, or holding…

Published Aug 15, 2026EPSS 0.24%

Overview

CVE-2026-74537 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: hold sk properly in iso_conn_ready

sk deref in iso_conn_ready must be done either under conn->lock, or

holding a refcount, to avoid concurrent close. conn->sk is currently

accessed without either:

[Task 1] [Task 2]

iso_sock_release

iso_conn_ready

sk = conn->sk

lock_sock(sk)

conn->sk = NULL

lock_sock(sk)

release_sock(sk)

iso_sock_kill(sk)

UAF on sk deref

Fix possible UAF by holding sk refcount in iso_conn_ready(). Also

recheck after lock_sock that the socket is still valid. Adjust locking

so conn->sk is cleared only under lock_sock.

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/0d255e63fcf3f13a570d7ac11678fa1164ac015cRefgit.kernel.org/stable/c/1308d72903d792d10b82bc4ef08b8a4452308b04Refgit.kernel.org/stable/c/4e9b5e8669b3602a4e01b6d1e9539b72e42c84d5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-74537?

CVE-2026-74537 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-2026-74537?

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-2026-74537?

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-2026-74537?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-74537 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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