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Suricata IDS/IPS CVE-2026-57222

MEDIUM
2026-09-14 vendor:ubuntu
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Severity by source

vuln.today AI
3.7 LOW

Network-reachable via crafted traffic (AV:N), high complexity due to hash collision requirement (AC:H), no privileges or interaction needed; integrity-only impact from detection bypass.

3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Lifecycle Timeline

1
Analysis Generated
Sep 14, 2026 - 09:11 vuln.today

DescriptionCVE.org

[ippair: IPv4/IPv6 hash collision can reuse wrong IPPair state]

AnalysisAI

IPv4/IPv6 hash collision in Suricata's IPPair tracking mechanism causes the engine to reuse state belonging to the wrong IP pair, leading to incorrect stateful evaluation of network traffic. The vulnerability affects deployments where both IPv4 and IPv6 traffic is processed and IPPair-based rules or datasets are active. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires that the Suricata deployment processes both IPv4 and IPv6 traffic simultaneously (dual-stack environment), and that at least one active ruleset uses IPPair-dependent keywords such as 'iprep', 'dataset', or threshold directives tied to IP pairs. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Without a formal CVSS vector, risk must be inferred from the technical description. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to the patched version of Suricata as released by the upstream project or via the Ubuntu package repositories. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-57222 vulnerability details – vuln.today

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