EUVD-2026-75786Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Network-reachable via UDP LDAP traffic with no privileges or interaction; impact is purely availability - memory exhaustion with no confidentiality or integrity effect.
Primary rating from Vendor (GitHub_M).
CVSS VectorVendor: GitHub_M
Lifecycle Timeline
4DescriptionCVE.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, LDAP transaction state could store an unbounded number of responses. Because LDAP can be processed over UDP, crafted traffic may cause Suricata to consume excessive memory, potentially resulting in denial of service. Version 8.0.5 contains a fix. As a workaround, disable LDAP application-layer parsing where it is not required. Alternatively, use a rule like alert ldap any any -> any any (sid: 1; ldap.responses.count: >1024; bypass;).
AnalysisAI
Uncontrolled memory growth in Suricata's LDAP application-layer parser allows unauthenticated remote attackers to exhaust host memory by sending crafted LDAP traffic over UDP, resulting in denial of service. Affected versions are 8.0.0 through 8.0.4; the flaw does not extend to the 7.x release line based on the stated version range. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Suricata must be running version 8.0.0 through 8.0.4 with LDAP application-layer parsing enabled - the default state for 8.0.x deployments. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (score 7.5) accurately reflects a network-reachable, zero-privilege, zero-interaction DoS: low complexity and no prerequisites other than the ability to route crafted LDAP packets through a monitored segment. … 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, which introduces a bounded limit on LDAP response storage per transaction. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all systems running Suricata versions 8.0.0 through 8.0.4 in production; within 7 days, apply the vendor-released patch to upgrade all affected instances to Suricata 8.0.5 or later; within 30 days, verify patch deployment across the entire estate and validate IDS/IPS monitoring resumption on network test traffic.
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An issue was discovered in Suricata 4.1.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, n
An issue was discovered in Suricata 4.1.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, n
An issue was discovered in Suricata 4.1.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, n
An issue was discovered in Suricata 4.1.3. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, n
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Same weakness CWE-400 – Uncontrolled Resource Consumption
View allSame technique Denial Of Service
View allVendor StatusVendor
SUSE
| Product | Status |
|---|---|
| openSUSE Tumbleweed | Fixed |
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External POC / Exploit Code
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