# CVE-2026-80935

## Summary

- **CVE ID:** CVE-2026-80935
- **Severity:** HIGH
- **CVSS Score:** 8.8 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 14, 2026

## Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

mt7996_mcu_get_eeprom() derives the destination of the EFUSE/EXT block
copy from the address reported by the MCU response (event->addr, a
device-controlled __le32) and clamps only the copy length, never the
destination offset into dev->mt76.eeprom.data. A malicious or
malfunctioning device can report an arbitrary address and drive an
out-of-bounds write of up to MT7996_EXT_EEPROM_BLOCK_SIZE bytes past
eeprom.data.

Reject a response whose address would place the copy outside eeprom.data
before deriving the destination pointer. Devices that echo the requested
in-bounds offset are unaffected.

## Affected Products

- Linux — Linux (98686cd21624c75a043e96812beadddf4f6f48e5)
- Linux — Linux (6.2)
- Linux — Linux (0)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)
- Linux — Linux (6.18.52)

## References

- [CNA](https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384)
- [CNA](https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4)
- [CNA](https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.24%
- **EPSS Percentile:** 15.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-18._