bgpd/bgp_label.c in FRRouting (FRR) before 8.5 attempts to read beyond the end of the stream during labeled unicast parsing.
https://lists.debian.org/debian-lts-announce/2024/04/msg00019.html
https://github.com/FRRouting/frr/pull/12956
https://github.com/FRRouting/frr/pull/12951
https://github.com/FRRouting/frr/compare/frr-8.5-rc...frr-8.5