CVE-2026-72479 iio: accel: mma8452: handle I2C read error(s) in mma8452_read()
A local attacker can read uninitialized stack memory via the MMA8452 accelerometer driver due to unhandled I2C read errors.
- 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-2026-72479?
CVE-2026-72479 is a vulnerability in Linux, published on 15 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:
iio: accel: mma8452: handle I2C read error(s) in mma8452_read()
Currently, If i2c_smbus_read_i2c_block_data() fails but mma8452_set_runtime_pm_state() succeeds, mma8452_read() returns 0.
As a result, the caller mma8452_read_raw() assumes the read was successful and proceeds to use a buffer containing uninitialized stack memory.
Add proper checking of the I2C read return value and propagate errors to the caller.
Which versions are affected by CVE-2026-72479?
How do I fix CVE-2026-72479?
Apply the vendor's patch.
Is CVE-2026-72479 being exploited?
There is no known exploitation of CVE-2026-72479 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-72479, DEBIAN-CVE-2026-72479, GHSA-j6gg-x4g3-q925, UBUNTU-CVE-2026-72479.