What’s Vulnerable › Vulnerabilities

CVE-2026-80935: wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-11 · updated 2026-10-21

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 kernel: 6.2 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4
• https://git.kernel.org/stable/c/388f471ca4758f644394b681ce97677a4d0e772c
• https://git.kernel.org/stable/c/4892be1ef0bbe6db6b13bf46cb79b6706bb5b214
• https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384
• https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176

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