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Suricata 8.x < 8.0.4 NULL Pointer Dereference

high Nessus Plugin ID 304683

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Synopsis

An IDS/IPS solution running on the remote host is affected by a NULL pointer dereference vulnerability.

Description

The version of OISF Suricata installed on the remote host is 8.x prior to 8.0.4. It is, therefore, affected by a vulnerability:

 - Use of the 'tls.alpn' rule keyword can cause Suricata to crash with a NULL dereference. (CVE-2026-31931)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade Suricata to version 8.0.4 or higher.

See Also

https://www.suse.com/security/cve/CVE-2026-31931.html

Plugin Details

Severity: High

ID: 304683

File Name: suricata_8_0_4.nasl

Version: 1.3

Type: Local

Agent: windows, macosx, unix

Family: Misc.

Published: 4/2/2026

Updated: 4/6/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:oisf:suricata

Required KB Items: installed_sw/Open Information Security Foundation Suricata

Exploit Ease: No known exploits are available

Patch Publication Date: 3/28/2026

Vulnerability Publication Date: 3/28/2026

Reference Information

CVE: CVE-2026-31931

IAVB: 2026-B-0081