Bug 2539208 - CVE-2026-71855 suricata: Suricata: Detection bypass via IPv4/IPv6 hash collision [epel-all]
Summary: CVE-2026-71855 suricata: Suricata: Detection bypass via IPv4/IPv6 hash collis...
Keywords:
Status: NEW
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: suricata
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Steve Grubb
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["55b35000-0739-44fb-a7e5-d...
Depends On:
Blocks: CVE-2026-71855
TreeView+ depends on / blocked
 
Reported: 2026-09-23 08:37 UTC by Vladimir Vasilev
Modified: 2026-09-23 08:37 UTC (History)
3 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Type: ---
Embargoed:


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Description Vladimir Vasilev 2026-09-23 08:37:49 UTC
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.


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