CVE-2026-31931CWE-476

Suricata tls: null dereference in tls.alpn rule keyword

High · published April 2, 2026

CVSS v3.1
7.5
EPSS
0%
Percentile
39.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00467 · 39.5th percentile
Weakness
CWE-476 · NULL Pointer Dereference
Published
2026-04-02T14:01Z
EPSS history
Timeline
  • 02 APR 14:01Z
    Suricata tls: null dereference in tls.alpn rule keyword
    cvelistv5