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CVE-2026-80721

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: ensure no dangling hcon references in iso_conn After iso_conn_del(), ISO sockets should not dereference the hco…

Published Aug 28, 2026EPSS 0.38%

Overview

CVE-2026-80721 is a high-severity vulnerability. It was published on August 28, 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: ensure no dangling hcon references in iso_conn

After iso_conn_del(), ISO sockets should not dereference the hcon any

more. Currently, clearing iso_conn::hcon relies on iso_conn_del()

releasing the last reference to the iso_conn.

Simplify this by explicitly clearing conn->hcon in iso_conn_del(), to

avoid more complex reasoning on races about who holds the last

reference.

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/aa9f7cb2bd3a2be998ceb739fc9a2f986eba43ebRefgit.kernel.org/stable/c/cdce8af9291d8a1f8916c271de029bf558d9e8ecRefgit.kernel.org/stable/c/e941799c31f68e67ce0976efb38a79101f921b64

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80721?

CVE-2026-80721 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-80721?

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-2026-80721?

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-2026-80721?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80721 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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