CVE-2023-53834 iio: adc: ina2xx: avoid NULL pointer dereference on OF device match
A local attacker with specific hardware configuration can cause a kernel crash via NULL pointer dereference in the INA2xx ADC 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-2023-53834?
CVE-2023-53834 is a vulnerability in Linux, published on 9 Dec 2025. 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: adc: ina2xx: avoid NULL pointer dereference on OF device match
The affected lines were resulting in a NULL pointer dereference on our platform because the device tree contained the following list of compatible strings:
power-sensor@40 { compatible = "ti,ina232", "ti,ina231"; ... };
Since the driver doesn't declare a compatible string "ti,ina232", the OF matching succeeds on "ti,ina231". But the I2C device ID info is populated via the first compatible string, cf. modalias population in of_i2c_get_board_info(). Since there is no "ina232" entry in the legacy I2C device ID table either, the struct i2c_device_id *id pointer in the probe function is NULL.
Fix this by using the already populated type variable instead, which points to the proper driver data. Since the name is also wanted, add a generic one to the ina2xx_config table.
Which versions are affected by CVE-2023-53834?
How do I fix CVE-2023-53834?
Apply the vendor's patch.
Is CVE-2023-53834 being exploited?
There is no known exploitation of CVE-2023-53834 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53834, DEBIAN-CVE-2023-53834, GHSA-vwr3-mpmm-8xqx, ROOT-OS-DEBIAN-11-CVE-2023-53834, UBUNTU-CVE-2023-53834.