CVE-2026-63981

A flaw was found in the Linux kernel's net/sched: act_mirred component. An unprivileged local user, by leveraging user namespaces to gain network administration capabilities, can create a specific network configuration that triggers an unbounded recursion. This recursion bypasses a depth limit check, leading to a kernel stack overflow. Successful exploitation of this vulnerability results in a kernel panic, effectively causing a Denial of Service (DoS) on the system.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.