An issue was discovered in FRRouting FRR through 9.0.1. A crash can occur for a crafted BGP UPDATE message without mandatory attributes, e.g., one with only an unknown transit attribute.
https://lists.debian.org/debian-lts-announce/2024/04/msg00019.html
https://github.com/FRRouting/frr/pull/14645/commits/d8482bf011cb2b173e85b65b4bf3d5061250cdb9