CVE-2026-64223
kernel: wifi: mac80211: consume only present negotiated TTLM maps
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · July 24, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's mac80211 Wi-Fi driver. This vulnerability, an out-of-bounds read, occurs when parsing negotiated Time-To-Live Map (TTLM) elements. A remote attacker could craft a sparse map, causing the parser to read beyond the intended memory boundary. While direct policy changes are prevented, this issue can lead to memory corruption, potentially impacting system stability.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-125 · Out-of-bounds Read