Vulnerability in Linux

CVE-2026-64515

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.

EPSS: 0.002 (14.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H.

Affected products

  • Linux — versions 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff, 6.9, 0

References

Frequently asked questions

What is CVE-2026-64515?
CVE-2026-64515 is a high-severity vulnerability in Linux. CVSS score: 8.3/10. Published 2026-07-25.
How severe is CVE-2026-64515?
High severity. CVSS v3 base score is 8.3 out of 10.