CVE-2025-21659

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A vulnerability in the Linux kernel has been resolved, which prevented accessing NAPI instances from another namespace. The NAPI IDs were not fully exposed to user space prior to the netlink API, so they were never namespaced. The netlink API must ensure that at the very least NAPI instance belongs to the same netns as the owner of the genl sock.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.