CVE-2026-80937 wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy
A malicious WiFi device can trigger an out-of-bounds write in the mt7915 driver, potentially allowing code execution or privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80937?
CVE-2026-80937 is a high-severity memory corruption vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7915: bound the device EEPROM address before the EFUSE copy
mt7915_mcu_get_eeprom() copies a fixed EFUSE block into the driver's dev->mt76.eeprom.data buffer at the offset reported by the MCU response (res->addr, a device-controlled __le32) without checking it against the buffer size. A malicious or malfunctioning device can report an arbitrary address and drive a 16-byte out-of-bounds write 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.
Which versions are affected by CVE-2026-80937?
How do I fix CVE-2026-80937?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-80937 being exploited?
There is no known exploitation of CVE-2026-80937 in the wild and no public exploit code.
Sources
Also known as AZL-100416, BELL-CVE-2026-80937, DEBIAN-CVE-2026-80937, GHSA-c9p9-v2fp-rr7g, UBUNTU-CVE-2026-80937.