CVE-2025-38133 iio: adc: ad4851: fix ad4858 chan pointer handling
A pointer handling error in the Linux kernel AD4851 ADC driver can lead to memory corruption, potentially allowing code execution or system crashes.
- 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-2025-38133?
CVE-2025-38133 is a high-severity memory corruption vulnerability in Linux kernel, published on 3 Jul 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: ad4851: fix ad4858 chan pointer handling
The pointer returned from ad4851_parse_channels_common() is incremented internally as each channel is populated. In ad4858_parse_channels(), the same pointer was further incremented while setting ext_scan_type fields for each channel. This resulted in indio_dev->channels being set to a pointer past the end of the allocated array, potentially causing memory corruption or undefined behavior.
Fix this by iterating over the channels using an explicit index instead of incrementing the pointer. This preserves the original base pointer and ensures all channel metadata is set correctly.
Weakness: CWE-787
Which versions are affected by CVE-2025-38133?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-38133?
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-2025-38133 being exploited?
There is no known exploitation of CVE-2025-38133 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-38133, GHSA-2789-v55f-r7v6, UBUNTU-CVE-2025-38133.