High [CVE-2026-64515] fix MLE defragmentation
This high-severity Red Hat Linux advisory covers CVE-2026-64515 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat package: kernel-rt.
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Summary
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. This can lead to a heap data overrun, which is a form of memory corruption that may result in system instability or unexpected behavior.
Red Hat severity: Moderate — CVSS 7 (CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H). Weakness: CWE-823.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9. Red Hat fixing advisory: RHSA-2026:65334, RHSA-2026:67150.
Affected products named by the advisory: Red Hat package: kernel-rt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 28 days ago·verify at source
- kernel-0:6.12.0-211.53.1.el10_2
- kernel-0:5.14.0-687.47.1.el9_8
- RHSA-2026:65334
- RHSA-2026:67150
Official advisory · high-confidence parse· fetched 28 days ago·verify at source
Mitigation
Upgrade to a fixed release: kernel-0:6.12.0-211.53.1.el10_2, kernel-0:5.14.0-687.47.1.el9_8, RHSA-2026:65334, RHSA-2026:67150. That is the remediation for this advisory.
The vendor advisory may list interim mitigations or workarounds not captured here. Review it before change work.
Official advisory · high-confidence parse· fetched 28 days ago·verify at source
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