EUVD-2026-18237

| CVE-2026-31931 HIGH
2026-04-02 [email protected]
7.5
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

4
Patch Released
Apr 02, 2026 - 20:30 nvd
Patch available
EUVD ID Assigned
Apr 02, 2026 - 14:22 euvd
EUVD-2026-18237
Analysis Generated
Apr 02, 2026 - 14:22 vuln.today
CVE Published
Apr 02, 2026 - 14:16 nvd
HIGH 7.5

Tags

Denial Of Service Null Pointer Dereference

Description

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.

Analysis

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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Remediation

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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Priority Score

38
Low Medium High Critical
KEV: 0
EPSS: +0.0
CVSS: +38
POC: 0

Vendor Status

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EUVD-2026-18237 vulnerability details – vuln.today
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