CVE-2023-52627 iio: adc: ad7091r: Allow users to configure device events
A missing callback implementation in the AD7091R ADC driver causes a kernel null pointer dereference, leading to a system crash.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-52627?
CVE-2023-52627 is a medium-severity vulnerability in Debian Debian Linux, published on 26 Mar 2024. 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: ad7091r: Allow users to configure device events
AD7091R-5 devices are supported by the ad7091r-5 driver together with the ad7091r-base driver. Those drivers declared iio events for notifying user space when ADC readings fall bellow the thresholds of low limit registers or above the values set in high limit registers. However, to configure iio events and their thresholds, a set of callback functions must be implemented and those were not present until now. The consequence of trying to configure ad7091r-5 events without the proper callback functions was a null pointer dereference in the kernel because the pointers to the callback functions were not set.
Implement event configuration callbacks allowing users to read/write event thresholds and enable/disable event generation.
Since the event spec structs are generic to AD7091R devices, also move those from the ad7091r-5 driver the base driver so they can be reused when support for ad7091r-2/-4/-8 be added.
Weakness: CWE-476
Which versions are affected by CVE-2023-52627?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2023-52627?
Apply the vendor's patch.
Is CVE-2023-52627 being exploited?
There is no known exploitation of CVE-2023-52627 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2023-52627, DEBIAN-CVE-2023-52627, GHSA-4v2g-fxcq-4j44, UBUNTU-CVE-2023-52627.