CVE-2026-74710 xsk: require at least 16 bytes of TX metadata
A local attacker can read kernel memory beyond the registered area by providing short TX metadata in AF_XDP sockets.
- 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-2026-74710?
CVE-2026-74710 is a high-severity vulnerability in Linux, published on 22 Aug 2026. 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:
xsk: require at least 16 bytes of TX metadata
AF_XDP accepts a TX metadata length as small as eight bytes, but every supported request needs the flags plus at least one eight-byte request field. Such short metadata also lets the kernel read beyond the registered area.
Require 16 bytes rather than sizeof(struct xsk_tx_metadata) to preserve compatibility with applications that do not use launch-time metadata.
Which versions are affected by CVE-2026-74710?
How do I fix CVE-2026-74710?
Apply the vendor's patch.
Is CVE-2026-74710 being exploited?
There is no known exploitation of CVE-2026-74710 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-74710, DEBIAN-CVE-2026-74710, GHSA-3mjj-g5w8-p3gp, UBUNTU-CVE-2026-74710.