CVE-2026-43038 | Linux Kernel up to 6.19.11 ip6_err_gen_icmpv6_unreach cb[] privilege escalation (Nessus ID 316948)

A vulnerability was found in Linux Kernel up to 6.19.11. It has been rated as critical. This affects the function ip6_err_gen_icmpv6_unreach. This manipulation of the argument cb[] causes privilege escalation. This vulnerability appears as CVE-2026-43038. The attacker needs to be present on the local network. There is no available exploit. Upgrading the affected component is advised.