CVE-2026-43027

A flaw was found in the Linux kernel's netfilter subsystem, specifically within the `nf_conntrack_helper`. When a connection tracking helper is unregistered, its associated expectations are not properly cleaned up. This oversight can lead to a use-after-free vulnerability, where the system attempts to access memory that has already been released. A local attacker could exploit this to cause a system crash, resulting in a Denial of Service (DoS), or potentially achieve privilege escalation.