CVE-2023-53321: Linux Kernel

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: drop short frames While technically some control frames like ACK are shorter and end after Address 1, such frames shouldn't be forwarded through wmediumd or similar userspace, so require the full 3-address header to avoid accessing invalid memory if shorter frames are passed in.

Affected products

• Linux Linux Kernel: before 5.4.257 (fixed in 5.4.257); from 5.5, before 5.10.197 (fixed in 5.10.197); from 5.11, before 5.15.133 (fixed in 5.15.133); from 5.16, before 6.1.55 (fixed in 6.1.55); from 6.2, before 6.5.5 (fixed in 6.5.5)

Published 2025-09-16. Last modified 2026-06-17.