CVE-2026-23407

A flaw was found in AppArmor, a security module within the Linux kernel. A local user could exploit this vulnerability by providing a specially crafted Deterministic Finite Automaton (DFA), a set of rules for pattern matching, to the `verify_dfa()` function. This malformed input causes the system to access memory outside of its intended boundaries. Successful exploitation of this flaw could lead to a system crash, resulting in a Denial of Service (DoS).