CVE-2026-31931

HIGH

Suricata tls: null dereference in tls.alpn rule keyword

Title source: cna
STIX 2.1

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.

References (2)

Core 2
Core References
X_Refsource_Misc x_refsource_misc
https://redmine.openinfosecfoundation.org/issues/8294

Scores

CVSS v3 7.5
EPSS 0.0035
EPSS Percentile 26.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-476
Status published
Products (2)
oisf/suricata 8.0.0 - 8.0.4
OISF/suricata >= 8.0.0, < 8.0.4
Published Apr 02, 2026
Tracked Since Apr 02, 2026