Riskcovery

CVE-2026-64515

wifi: mac80211: fix MLE defragmentation

State
Published
Severity
8.3 High
Published
Jul 25, 2026
Updated
Oct 19, 2026
Reserved
Jul 19, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.18.3 HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:HLinux

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff to before 1f573e17bcb7275ddd1c8f47f46ae0faf0e902a4Affected
  • 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff to before 55c479aae99b120489a432db9c717484e523dfd6Affected
  • 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff to before 722b3f86df80644463d29fe5451e30a617f74500Affected
  • 4d70e9c5488dd57ff5fcabe4d4ecf3d9dd4555ff to before a74e893f30db64cdce0fc7a96d3baa417bcd55f5Affected
LinuxLinux
  • 6.9Affected
  • before 6.9Not affected
  • 6.12.92 through 6.12.*Not affected
  • 6.18.34 through 6.18.*Not affected
  • 7.0.11 through 7.0.*Not affected
  • 7.1 and laterNot affected

References

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