CVEvulnerability
CVE-2026-71855
7.5 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-09-18
- Last modified
- 2026-09-28
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 5.9 MEDIUM — CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-697
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.
Affected configurations
• oisf suricata (< 7.0.17)
• oisf suricata (>= 8.0.0 < 8.0.6)
Related
Weakness · CWE (1)
- CWE-697 Incorrect Comparison weakness
References
- https://github.com/OISF/suricata/commit/181b3b2fdd1fe87e4534de4fc79e29a083ef125f Patch
- https://github.com/OISF/suricata/commit/4e2f23d031fbcfd72883bacd3d723c9874f23701 Patch
- https://github.com/OISF/suricata/commit/bc41dcc854e24487d3786ce578a8a86a8350ab20 Patch
- https://github.com/OISF/suricata/releases/tag/suricata-7.0.17 Release Notes
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6 Release Notes
- https://github.com/OISF/suricata/security/advisories/GHSA-fvwh-wjcq-2586 Vendor Advisory
- https://redmine.openinfosecfoundation.org/issues/8558 Permissions Required