High severity · published Sep 11, 2026
CVE-2026-80935
wifi: mt76: mt7996: bound the device EEPROM address before the EFUSE copy
8.8
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 17% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
98686cd21624c75a043e96812beadddf4f6f48e5 before 4892be1ef0bbe6db6b13bf46cb79b6706bb5b214; 98686cd21624c75a043e96812beadddf4f6f48e5 before 388f471ca4758f644394b681ce97677a4d0e772c; 98686cd21624c75a043e96812beadddf4f6f48e5 before 9e5abb5e2ade0b6fd0e47209711115d47a255176; 98686cd21624c75a043e96812beadddf4f6f48e5 before 6be59da2063d5b3522bfde8aae0487ec095eb384; 98686cd21624c75a043e96812beadddf4f6f48e5 before 13b3c29a782033ce4a230be9e5618032813dbcd4; 6.2 · source: vendor