CVE-2026-80711 power: supply: max17040: handle missing status supplier
Local attackers can read uninitialized memory from battery status due to missing error handling in the MAX17040 driver.
- 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-2026-80711?
CVE-2026-80711 is a vulnerability in Linux, published on 28 Aug 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:
power: supply: max17040: handle missing status supplier
MAX17040 does not report charger state itself, so the driver forwards POWER_SUPPLY_PROP_STATUS to a supplier power supply. If no supplier is registered, power_supply_get_property_from_supplier() returns -ENODEV and leaves the output value untouched.
max17040_get_property() currently ignores that error and returns success, so userspace can read an uninitialized status value from the battery power supply. This happens on systems that use the fuel gauge without a charger supplier relationship in firmware.
Return POWER_SUPPLY_STATUS_UNKNOWN when no supplier provides STATUS, and propagate other supplier lookup errors.
Which versions are affected by CVE-2026-80711?
How do I fix CVE-2026-80711?
Apply the vendor's patch.
Is CVE-2026-80711 being exploited?
There is no known exploitation of CVE-2026-80711 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-80711, DEBIAN-CVE-2026-80711, GHSA-65qq-wp3h-275r, UBUNTU-CVE-2026-80711.