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util/swf: stack overflow on larger compressed data

High
jasonish published GHSA-p32q-7wcp-gv92 Nov 26, 2025

Package

suricata

Affected versions

< 7.0.13, < 8.0.2

Patched versions

7.0.13, 8.0.2

Description

Impact

A stack overflow that causes Suricata to crash can occur if SWF decompression is enabled.

Patches

Update to Suricata 7.0.13 or 8.0.2.

Workarounds

Disable SWF decompression (swf-decompression in suricata.yaml) ; it is disabled by default.
If you must enable it, set decompress-depth to lower than half your stack size.

References

https://redmine.openinfosecfoundation.org/issues/8055

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-2025-64332

Weaknesses

Stack-based Buffer Overflow

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Learn more on MITRE.