What’s Vulnerable › Vulnerabilities

CVE-2023-53321: wifi: mac80211_hwsim: drop short frames

• Severity: high (CVSS 7.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-09-16 · updated 2026-06-17

Description

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 kernel: before 5.4.257; from 5.5 before 5.10.197; from 5.11 before 5.15.133; from 5.16 before 6.1.55; from 6.2 before 6.5.5 — fixed in 5.10.197, 5.15.133, 5.4.257, 6.1.55, 6.5.5

How to fix

Upgrade to a fixed version: Linux kernel 5.10.197, 5.15.133, 5.4.257, 6.1.55. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3beb97bed860d95b14ad23578ce8ddaea62023db
• https://git.kernel.org/stable/c/672205c6f2d11978fcd7f0f336bb2c708e28874b
• https://git.kernel.org/stable/c/89a41ed7f21476301659ebd25ccb48a60791c1a7
• https://git.kernel.org/stable/c/b9a175e3b250b0dc6e152988040aa5014e98e61e
• https://git.kernel.org/stable/c/c64ee9dd335832d5e2ab0a8fc83a34ad4c729799
• https://git.kernel.org/stable/c/fba360a047d5eeeb9d4b7c3a9b1c8308980ce9a6

Get alerted when CVE-2023-53321 or the next vulnerability affects your stack