CVE-2026-49943

CZ.NIC BIRD Internet Routing Daemon (up to version 2.19.0) is affected by a stack-based buffer overflow in the BGP AS_PATH mask matching implementation (nest/a-path.c). The as_path_match() routine uses a fixed-size stack capable of 2048 + 1 pm_pos entries, while parse_path() expands AS_PATH segme...