CVE-2026-64515

wifi: mac80211: fix MLE defragmentation

HIGH
8.3
CVSS Score
Published: July 25, 2026 at 09:14 AM UTC
Updated: October 19, 2026 at 09:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.3
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff6.9
Vendor states this is fixed in 1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4 (fixed)
Vendor states this is fixed in 55c479aae99b120489a432db9c717484e523dfd6 (fixed)
Vendor states this is fixed in 722b3f86df80644463d29fe5451e30a617f74500 (fixed)
Vendor states this is fixed in a74e893f30db64cdce0fc7a96d3baa417bcd55f5 (fixed)
Vendor states this is fixed in 6.12.92 (unaffected)
Vendor states this is fixed in 6.18.34 (unaffected)
Vendor states this is fixed in 6.9 (unaffected)
Vendor states this is fixed in 7.0.11 (unaffected)
Vendor states this is fixed in 7.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.3HIGHLinux
Vector?

Quick Info

StatusRECEIVED
CWE
CWE-787

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