Bug 2454369 (CVE-2026-31931)

Summary: CVE-2026-31931 Suricata: Suricata: Denial of Service via 'tls.alpn' rule keyword
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Suricata, a network Intrusion Detection System (IDS), Intrusion Prevention System (IPS), and Network Security Monitoring (NSM) engine. An attacker could trigger a null dereference by using the "tls.alpn" rule keyword, causing the Suricata engine to crash. This vulnerability leads to a Denial of Service (DoS).
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2454444, 2454445    
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Description OSIDB Bzimport 2026-04-02 15:01:13 UTC
Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before version 8.0.4, use of the "tls.alpn" rule keyword can cause Suricata to crash with a NULL dereference. This issue has been patched in version 8.0.4.