CVE-2026-31931 HIGH

CVE-2026-31931: Suricata tls: null dereference in tls.alpn rule keyword

Vendor Oisf
Product suricata
Weakness CWE-476
Published April 2, 2026
Last update April 2, 2026
View on NVD All CVEs

CVSS base score

7.5/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity None

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 2, 2026 CVE published
April 2, 2026 Record updated