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
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80935
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-80935
git.kernel.org
https://git.kernel.org/stable/c/4892be1ef0bbe6db6b13bf46cb79b6706bb5b214
git.kernel.org
https://git.kernel.org/stable/c/388f471ca4758f644394b681ce97677a4d0e772c
git.kernel.org
https://git.kernel.org/stable/c/9e5abb5e2ade0b6fd0e47209711115d47a255176
git.kernel.org
https://git.kernel.org/stable/c/6be59da2063d5b3522bfde8aae0487ec095eb384
git.kernel.org
https://git.kernel.org/stable/c/13b3c29a782033ce4a230be9e5618032813dbcd4
More from Linux
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
7.8
CVE-2026-53362
ipv6: account for fraggap on the paged allocation path
7.8
CVE-2026-46300
net: skbuff: preserve shared-frag marker during coalescing
7.8
CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place
