Skip to content

rules: improper use of entropy keyword can lead to a NULL-ptr deref

High
victorjulien published GHSA-5qf6-92xg-3rr3 Sep 30, 2025

Package

suricata

Affected versions

8.0.0

Patched versions

8.0.1

Description

Impact

Bad use of the entropy keyword when not anchored to a "sticky" buffer can lead to a segmentation fault.

Patches

Update to 8.0.1.

Workarounds

Disable rules using the entropy keyword, or validate they are anchored to a sticky buffer.

References

https://redmine.openinfosecfoundation.org/issues/7838

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVE ID

CVE-2025-59148

Weaknesses

No CWEs