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CVE-2026-64515

8.3 · HIGH

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix MLE defragmentation If either reconf or EPCS multi-link element (MLE) is contained in a non-transmitted pro…

Published Jul 25, 2026EPSS 0.24%

Overview

CVE-2026-64515 is a high-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.3, 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:

wifi: mac80211: fix MLE defragmentation

If either reconf or EPCS multi-link element (MLE) is contained in

a non-transmitted profile, the defragmentation routine is called

with a pointer to the defragmented copy, but the original elements.

This is incorrect for two reasons:

- if the original defragmentation was needed, it will not find the

correct data

- if the original frame is at a higher address, the parsing will

potentially overrun the heap data (though given the layout of

the buffers, only into the new defragmentation buffer, and then

it has to stop and fail once that's filled with copied data.

Fix it by tracking the container along with the pointer and in

doing so also unify the two almost identical defragmentation

routines.

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/1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4Refgit.kernel.org/stable/c/55c479aae99b120489a432db9c717484e523dfd6Refgit.kernel.org/stable/c/722b3f86df80644463d29fe5451e30a617f74500Refgit.kernel.org/stable/c/a74e893f30db64cdce0fc7a96d3baa417bcd55f5

How CyberStrike helps

Frequently asked questions

What is CVE-2026-64515?

CVE-2026-64515 is a high-severity vulnerability. It was published on July 25, 2026 and has a CVSS 3.1 base score of 8.3 (HIGH).

How severe is CVE-2026-64515?

This vulnerability has a CVSS 3.1 base score of 8.3, 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-2026-64515?

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-2026-64515?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-64515 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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