CVE-2026-31931 — NULL Pointer Dereference in Suricata

CWE-476 — NULL Pointer Dereference7 documents6 sources
Severity
7.5HIGHNVD
EPSS
0.1%
top 81.26%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Oisf Suricata
Timeline
PublishedApr 2
Latest updateApr 3

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitability: 3.9 | Impact: 3.6

Affected Packages3 packages

▶NVDoisf/suricata8.0.0 — 8.0.4
▶Debianoisf/suricata< 1:8.0.4-1
▶CVEListV5oisf/suricata>= 8.0.0, < 8.0.4

🔴Vulnerability Details

3
OSV
CVE-2026-31931: (Suricata is a network IDS, IPS and NSM engine↗2026-04-03
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OSV
CVE-2026-31931: Suricata is a network IDS, IPS and NSM engine↗2026-04-02
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CVEList
Suricata tls: null dereference in tls.alpn rule keyword↗2026-04-02
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📋Vendor Advisories

2
Red Hat
Suricata: Suricata: Denial of Service via 'tls.alpn' rule keyword↗2026-04-02
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Debian
CVE-2026-31931: suricata - Suricata is a network IDS, IPS and NSM engine. From version 8.0.0 to before vers...↗2026
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🕵️Threat Intelligence

1
Wiz
CVE-2026-31931 Impact, Exploitability, and Mitigation Steps | Wiz↗
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CVE-2026-31931 — NULL Pointer Dereference in Suricata | cvebase