EUVD-2026-18237CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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4DescriptionNVD
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.
AnalysisAI
NULL pointer dereference in Suricata 8.0.0 through 8.0.3 causes denial of service when processing malformed TLS traffic with the 'tls.alpn' rule keyword. Remote unauthenticated attackers can crash the IDS/IPS engine by sending specially crafted network packets, completely disabling network security monitoring. …
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RemediationAI
Within 24 hours: Confirm all Suricata deployments and document affected versions (8.0.0-8.0.3). Within 7 days: Upgrade to Suricata 8.0.4 or later if available, or implement the compensating control listed below. …
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