EUVD-2026-75730Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Rule authorship requires administrative access (PR:H); AC:H reflects mandatory specific transform-chaining; only availability is impacted.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
2DescriptionCVE.org
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and prior to version 8.0.5, when certain detection transforms are chained, the decompress transform pipeline could read from an inspection buffer after it had been reallocated and freed. The issue is reached during network traffic processing, but requires a malicious rule as Suricata will crash whatever the traffic. Version 8.0.5 contains a fix. As a workaround, avoid rules that chain gunzip or zlib_deflate with max-size bigger than 4096 after another transform.
AnalysisAI
Use-after-free in Suricata 8.0.0-8.0.4 causes an engine crash when a malicious detection rule chains decompress transforms (gunzip or zlib_deflate with max-size exceeding 4096) after another transform, allowing the pipeline to read from a freed inspection buffer during subsequent network traffic processing. The net effect is a reliable denial-of-service: once the offending rule is loaded, any matching network traffic will crash the Suricata process regardless of traffic content. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the ability to introduce a malicious Suricata detection rule into the running rule set - this means administrative access to the Suricata rules directory, a compromised rule-distribution channel, or write access to a shared rule repository. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 5.9 (AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H) is partially accurate but requires scrutiny on the PR metric. … 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 patch: Suricata 8.0.5. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-416 – Use After Free
View allSame technique Denial Of Service
View allVendor StatusVendor
SUSE
| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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