EUVD-2026-75755Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Local-only trigger via rule file write access (AV:L/PR:L); heap overflow causes limited crash on load, no C/I impact.
Primary rating from Vendor (github).
CVSS VectorVendor: github
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Heap buffer overflow in Suricata's rule parser allows a local attacker with write access to rule files to crash the Suricata process during signature loading by supplying a crafted rule containing mixed-case frame keywords. Affected versions are all releases prior to 7.0.16 and 8.0.5. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the ability to write or supply a rule file that Suricata loads during signature initialization or reload. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 3.3 (AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L) accurately reflects the narrow exploitability of this issue. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Vendor-released patches are available: upgrade to Suricata 7.0.16 (for 7.x deployments) or Suricata 8.0.5 (for 8.x deployments), as announced at https://forum.suricata.io/t/suricata-8-0-5-and-7-0-16-released/6315. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
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