EUVD-2026-75728Severity by source
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Network vector with AC:H because attacker needs specific crafted traffic and target must run a vulnerable chained-transform rule; impact is availability-only (engine crash).
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
3DescriptionCVE.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, Suricata's inspection-buffer helper could leave an inspection pointer referencing freed memory after a chained transform caused the backing buffer to be reallocated. The issue is reached during a specific network traffic processing, and requires a specific but not malicious rule. Versions 7.0.16 and 8.0.5 contain a fix. As a workaround, avoid rules that chain dotprefix transform after another one.
AnalysisAI
Use-after-free in Suricata's inspection-buffer helper crashes the IDS/IPS engine, yielding a network-exploitable denial-of-service against any deployment running rules that chain the dotprefix transform after another transform. Affected versions prior to 7.0.16 (stable) and 8.0.5 include all prior 7.x and 8.x releases. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires two concurrent conditions: (1) the target Suricata instance must have at least one active rule that chains the `dotprefix` transform immediately after another transform - this is a non-default configuration dependent on the operator's ruleset choices; and (2) the attacker must send specific network traffic that triggers that rule's matching logic, causing the inspection-buffer reallocation sequence. … 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) accurately reflects the threat model: the network vector is correct because the trigger is specific crafted network traffic, but AC:H acknowledges that exploitation requires a pre-existing ruleset containing a `dotprefix` chained after another transform - a configuration condition the attacker cannot control and must probe or infer. … 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 or 8.0.5 as appropriate for your branch. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-416 – Use After Free
View allSame technique Use After Free
View allVendor StatusVendor
SUSE
| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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