CVE-2025-22101 net: libwx: fix Tx L4 checksum
A bug in the libwx network driver causes a transmit ring hang for non-TCP/UDP/SCTP packets, leading to denial of service.
- 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-2025-22101?
CVE-2025-22101 is a medium-severity denial of service vulnerability in Linux kernel, published on 16 Apr 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: libwx: fix Tx L4 checksum
The hardware only supports L4 checksum offload for TCP/UDP/SCTP protocol. There was a bug to set Tx checksum flag for the other protocol that results in Tx ring hang. Fix to compute software checksum for these packets.
Which versions are affected by CVE-2025-22101?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2025-22101?
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-2025-22101 being exploited?
There is no known exploitation of CVE-2025-22101 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2025-22101, DEBIAN-CVE-2025-22101, GHSA-x8hg-f9pc-8q66, ROOT-OS-UBUNTU-2404-CVE-2025-22101, UBUNTU-CVE-2025-22101.