CVE-2022-49642 net: stmmac: dwc-qos: Disable split header for Tegra194
An integer overflow in the Synopsys DWC Ethernet driver for Tegra194 causes random system crashes when split header feature is enabled.
- 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-2022-49642?
CVE-2022-49642 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 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:
net: stmmac: dwc-qos: Disable split header for Tegra194
There is a long-standing issue with the Synopsys DWC Ethernet driver for Tegra194 where random system crashes have been observed [0]. The problem occurs when the split header feature is enabled in the stmmac driver. In the bad case, a larger than expected buffer length is received and causes the calculation of the total buffer length to overflow. This results in a very large buffer length that causes the kernel to crash. Why this larger buffer length is received is not clear, however, the feedback from the NVIDIA design team is that the split header feature is not supported for Tegra194. Therefore, disable split header support for Tegra194 to prevent these random crashes from occurring.
[0] https://lore.kernel.org/linux-tegra/[email protected]/
Weakness: CWE-190
Which versions are affected by CVE-2022-49642?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49642?
Apply the vendor's patch.
Is CVE-2022-49642 being exploited?
There is no known exploitation of CVE-2022-49642 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49642, GHSA-ff9c-3whq-q5mm, UBUNTU-CVE-2022-49642.