CVE-2026-71855

Published: Sep 18, 2026Modified: Sep 28, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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 (2)

Products: Oisf: Suricata

1 product

Configuration A

2 vulnerable

Vulnerable Software	Affected Versions
Oisf Suricata	version < 7.0.17
Oisf Suricata	8.0.0 ≤ version < 8.0.6

Related CWEs

Incorrect Comparison

The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses.

References (7)

https://github.com/OISF/suricata/commit/181b3b2fdd1fe87e4534de4fc79e29a083ef125f

Source: security-advisories@github.com

Patch

https://github.com/OISF/suricata/commit/4e2f23d031fbcfd72883bacd3d723c9874f23701

Source: security-advisories@github.com

Patch

https://github.com/OISF/suricata/commit/bc41dcc854e24487d3786ce578a8a86a8350ab20

Source: security-advisories@github.com

Patch

https://github.com/OISF/suricata/releases/tag/suricata-7.0.17

Source: security-advisories@github.com

Release Notes

https://github.com/OISF/suricata/releases/tag/suricata-8.0.6

Source: security-advisories@github.com

Release Notes

https://github.com/OISF/suricata/security/advisories/GHSA-fvwh-wjcq-2586

Source: security-advisories@github.com

Vendor Advisory

https://redmine.openinfosecfoundation.org/issues/8558

Source: security-advisories@github.com

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Timeline

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