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.
What this means for your business
- An attacker can use it only with access to the machine itself, with an ordinary user login, and without anyone at your company clicking anything.
- FIRST's prediction model gives it a 0.1% chance of attack attempts being seen in the next 30 days, ranking above 2% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
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Scoring
- CVSS
- 3.3 (v3.1)
- Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L- Weakness
- CWE-122
- Assigned by
- security-advisories@github.com
Dates
- Published
- 2026-09-18
- Last modified
- 2026-09-23
- Sources
- NVD
References
- https://github.com/OISF/suricata/commit/5449ae170bfce213907d9bab87143a59774ed48f
- https://github.com/OISF/suricata/commit/d62acf5d75a61b76b16815e773408852f41b1975
- https://github.com/OISF/suricata/pull/15807
- https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
- https://github.com/OISF/suricata/security/advisories/GHSA-6qwq-j83r-qp34
- https://redmine.openinfosecfoundation.org/issues/8590