CVE-2023-38406: Frrouting

Critical severity, CVSS 9.8. EPSS: 0.9% chance of exploitation in the next 30 days.

bgpd/bgp_flowspec.c in FRRouting (FRR) before 8.4.3 mishandles an nlri length of zero, aka a "flowspec overflow."

Affected products

• Frrouting Frrouting: before 8.4.3 (fixed in 8.4.3)

Published 2023-11-06. Last modified 2026-06-17.