Buffer overflow in Oisf Suricata
CVE-2026-63451
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. From 8.0.0 until 8.0.6, a locally supplied detection rule that combines frame inspection without content and a transformed match without content can make src/detect-engine-prefilter.c select multiple non-prefilter frame engines while preparing signatures for non-prefilter inspection. Loading the crafted rule, including in test mode, can trigger a heap buffer overflow and crash Suricata; network traffic alone cannot reach the flaw. This issue is fixed in version 8.0.6.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.001 (4.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Oisf Suricata — versions >= 8.0.0, < 8.0.6
Weakness classification (CWE)
References
- github.com/OISF/suricata/security/advisories/GHSA-6qwq-j83r-qp34 (Mitigation, Vendor Advisory)
- github.com/OISF/suricata/pull/15807 (Patch)
- github.com/OISF/suricata/commit/5449ae170bfce213907d9bab87143a59774ed48f (Patch)
- github.com/OISF/suricata/commit/d62acf5d75a61b76b16815e773408852f41b1975 (Patch)
- github.com/OISF/suricata/releases/tag/suricata-8.0.6 (Release Notes)
- redmine.openinfosecfoundation.org/issues/8590 (Permissions Required)
Frequently asked questions
- What is CVE-2026-63451?
- CVE-2026-63451 is a low-severity vulnerability in Oisf Suricata, classified under Heap-based Buffer Overflow. CVSS score: 3.3/10. Published 2026-09-18.
- How severe is CVE-2026-63451?
- Low severity. CVSS v3 base score is 3.3 out of 10.