Detections
Analytics
CVE-2026-71855
medium
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, src/flow-hash.c can treat an IPv4 and IPv6 flow as equal without comparing the IP family when their raw address words, ports, protocol, VLAN, recursion level, live device, and hash bucket align. An IPv6 packet can therefore reuse IPv4 flow state or the reverse, causing incorrect flowbit state, detection bypass, or IP-only bypass. This issue is fixed in versions 8.0.6 and 7.0.17.
References
https://redmine.openinfosecfoundation.org/issues/8558
https://github.com/OISF/suricata/security/advisories/GHSA-fvwh-wjcq-2586
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
https://github.com/OISF/suricata/commit/bc41dcc854e24487d3786ce578a8a86a8350ab20
https://github.com/OISF/suricata/commit/4e2f23d031fbcfd72883bacd3d723c9874f23701
https://github.com/OISF/suricata/commit/181b3b2fdd1fe87e4534de4fc79e29a083ef125f