CVE-2026-45762 OISF CVE debrief

Who should care

Network defenders and administrators using Suricata as a network Intrusion Detection System, Intrusion Prevention System, or Network Security Monitoring engine should assess their exposure and prioritize updating to versions 7.0.16 or 8.0.5.

Why it matters

A vulnerability in Suricata's IP defragmentation tracker lookup could lead to a remote packet-triggered crash and denial of service. Defenders should prioritize updating Suricata to versions 7.0.16 or 8.0.5 to prevent potential crashes and denial of service attacks. Network defenders and administrators using Suricata should assess their exposure and take necessary actions.

• Potential remote packet-triggered crash
• Potential denial of service attack
• Need to verify and update Suricata versions
• Possible impact on network security monitoring

Technical summary

Suricata's IP defragmentation tracker lookup did not verify that an existing tracker used the same IP address family as the packet being processed. Under crafted fragmented IPv4/IPv6 traffic, an IPv6 fragment could be associated with an IPv4 defragmentation tracker, leading to a remote packet-triggered crash and denial of service. The issue can be addressed by updating Suricata to versions 7.0.16 or 8.0.5, which contain a fix for this vulnerability. Additionally, defenders can enable AF_PACKET's defrag option if using Suricata as an IDS with AF_PACKET to prevent seeing such fragmented packets.

Defensive priority

Defenders should prioritize updating Suricata to versions 7.0.16 or 8.0.5 to prevent potential crashes and denial of service attacks.

Recommended defensive actions

• Update Suricata to version 7.0.16 or 8.0.5
• Enable AF_PACKET's defrag option if using Suricata as an IDS with AF_PACKET
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD vulnerability detail page provide information on the vulnerability, its impact, and potential mitigations. Release notes and vendor advisories also offer guidance on addressing the issue.

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.