CVE-2025-38425 i2c: tegra: check msg length in SMBUS block read
A missing length check in the Tegra I2C driver allows a device to trigger a denial of service by sending invalid SMBUS block read messages.
- 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-2025-38425?
CVE-2025-38425 is a high-severity denial of service vulnerability in Debian Debian Linux, published on 25 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:
i2c: tegra: check msg length in SMBUS block read
For SMBUS block read, do not continue to read if the message length passed from the device is '0' or greater than the maximum allowed bytes.
Which versions are affected by CVE-2025-38425?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-38425?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-38425 being exploited?
There is no known exploitation of CVE-2025-38425 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-38425, DEBIAN-CVE-2025-38425, GHSA-v3g7-mv58-c2hx, ROOT-OS-DEBIAN-11-CVE-2025-38425, ROOT-OS-DEBIAN-12-CVE-2025-38425, ROOT-OS-UBUNTU-2204-CVE-2025-38425 and 2 more.