CVE-2026-45761
Suricata detect: case-insensitive frame handling can cause heap buffer overflow during rule load
- State
- Published
- Severity
- 3.3 Low
- Published
- Sep 10, 2026
- Updated
- Sep 15, 2026
- Reserved
- May 13, 2026
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.0.5, a crafted rule using mixed-case frame syntax could trigger a heap buffer overflow while Suricata is loading signatures. The issue is reached during rule parsing/loading rather than by network traffic alone. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, preprocess rules to check that frames are all lowercase and/or only load trusted rulesets.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 3.3 Low | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L | GitHub_M |
Weaknesses
- CWE-122 Heap-based Buffer Overflow
Affected Products
| Product | Versions |
|---|---|
suricataOISF |
|
References
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