CVE-2026-45766 OISF CVE debrief

Who should care

Network defenders and security teams responsible for managing Suricata installations should assess their exposure and prioritize updating to the fixed versions to prevent potential denial of service attacks. This is particularly important for environments where Suricata is used for network security monitoring and intrusion detection/prevention.

Why it matters

CVE-2026-45766 is a high-severity vulnerability in Suricata that can lead to denial of service via crafted NFS traffic. Network defenders and security teams should assess their exposure, prioritize updates to versions 7.0.16 or 8.0.5, and consider temporary workarounds like disabling NFS application-layer parsing if immediate updates are not feasible. The corpus provides details on the vulnerability and fixes but does not establish versions, exploitation, impact, or remediation beyond the provided information, requiring verification from official sources.

• Denial of service via excessive memory consumption
• Potential network security monitoring and intrusion detection/prevention service disruption
• Need for verification of affected versions and exposure
• Priority for updating or applying workarounds

Technical summary

The Suricata engine, used for network Intrusion Detection, Intrusion Prevention, and Network Security Monitoring, has a vulnerability in its NFS parser state structures. These structures are insufficiently bounded, allowing crafted NFS traffic to cause Suricata to consume excessive memory. This excessive memory consumption can lead to a denial of service. The vulnerability is addressed in Suricata versions 7.0.16 and 8.0.5. As a temporary workaround, disabling NFS application-layer parsing can mitigate the risk if updating is not immediately feasible.

Defensive priority

Defenders should prioritize updating Suricata to versions 7.0.16 or 8.0.5 to prevent potential denial of service attacks. If immediate updates are not feasible, disabling NFS application-layer parsing may serve as a temporary workaround.

Recommended defensive actions

• Update Suricata to version 7.0.16 or 8.0.5
• Disable NFS application-layer parsing if not needed
• Monitor for unusual NFS traffic patterns
• Review Suricata configurations for potential vulnerabilities
• Perform an inventory of assets using Suricata for exposure review
• Consider compensating controls for exposed systems while remediation is scheduled
• Track exceptions and retest remediated assets

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, its impact, and available fixes. However, the corpus does not establish versions, exploitation, impact, or remediation beyond the provided information, requiring verification from official sources.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.