BIRD 3.3.1 (2026-06-09)

• BGP: Fix crash when incoming connection for disabled protocol arrives
• BGP: Fix parsing labelled NLRIs with no next hop
• BGP: Fix cork behavior in collision with graceful restart
• BGP: Fix crash on dumping pending export statistics
• BGP: Fix several issues in Flowspec handling
• BMP/Nest: No refeed after listener or protocol restart
• MPLS: Fix crash on reconfiguring CS_DOWN channel
• OSPF: Fix handling of LLS data length field
• OSPF: Fix OOB read in authentication check
• OSPF: Fix OOB read in Router-LSA validation
• Proto: Fix regression in protocol enabling
• Channel: Fix refeeds and reloads during graceful restart
• Export: Mitigate duplicate withdrawals
• Filters: Fix crash when setting gateway on recursive nexthops
• Filters: Fix path matching when AS path is too long
• Table: Fix RCU double-anchor
• Table: Propagate thread group config into aux
• RCU: Catch leaks sooner

See also: https://trubka.network.cz/pipermail/bird-users/2026-June/018790.html