CVE-2026-31931

Suricata tls: null dereference in tls.alpn rule keyword

State: Published
Severity: 7.5 High
Published: Apr 2, 2026
Updated: Apr 2, 2026
Reserved: Mar 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M

Weaknesses

CWE-476 NULL Pointer Dereference

Affected Products

Product	Versions
suricataOISF	>= 8.0.0, < 8.0.4Affected

References

https://github.com/OISF/suricata/security/advisories/GHSA-gr22-4784-xvw3
https://redmine.openinfosecfoundation.org/issues/8294

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