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CVE-2026-31931

HIGH CVSS 3.1: 7.5 EPSS 0.06%
Updated Apr 07, 2026
Oisf
Parameter Value
CVSS 7.5 (HIGH)
Affected Versions 8.0.0 — 8.0.4
Fixed In 8.0.4
Type CWE-476 (NULL Pointer Dereference)
Vendor Oisf
Public PoC No

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.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Oisf Suricata
cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:*
8.0.0 8.0.4