CVE-2025-59148: Suricata's improper use of entropy keyword can lead to a NULL-ptr deref

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-10-01 · updated 2026-10-12
Weakness: CWE-476

Description

Suricata is a network IDS, IPS and NSM engine developed by the OISF (Open Information Security Foundation) and the Suricata community. Versions 8.0.0 and below incorrectly handle the entropy keyword when not anchored to a "sticky" buffer, which can lead to a segmentation fault. This issue is fixed in version 8.0.1. To workaround this issue, users can disable rules using the entropy keyword, or validate they are anchored to a sticky buffer.

Affected products

OISF suricata: 8.0.0, 8.0.0-beta1, 8.0.0-rc1

References

https://forum.suricata.io/t/suricata-8-0-1-and-7-0-12-released/6018
https://github.com/OISF/suricata/commit/9f32550e18f97ea5d610dd7c36aab0ba142c096c
https://github.com/OISF/suricata/security/advisories/GHSA-5qf6-92xg-3rr3
https://redmine.openinfosecfoundation.org/issues/7838

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