CVE-2026-45751 OISF CVE debrief

Who should care

Network security teams, particularly those using Suricata for network Intrusion Detection System, Intrusion Prevention System, and Network Security Monitoring, should assess exposure and apply patches or workarounds.

Why it matters

The vulnerability in Suricata could allow an inspection pointer to reference freed memory, potentially impacting network security. Network security teams should assess exposure and apply patches or workarounds.

• Network security teams need to assess exposure and apply patches or workarounds to prevent potential issues.
• The vulnerability requires specific network traffic processing and a specific but not malicious rule, which may limit its impact.
• Verification of network traffic processing and rule configurations is necessary to determine potential impact.

Technical summary

The vulnerability in Suricata could allow an inspection pointer to reference freed memory after a chained transform caused the backing buffer to be reallocated. This issue is reached during specific network traffic processing and requires a specific but not malicious rule. The fix is available in versions 7.0.16 and 8.0.5. Network security teams should assess exposure and apply patches or workarounds. The vulnerability requires specific network traffic processing and a specific but not malicious rule, which may limit its impact. Verification of network traffic processing and rule configurations is necessary to determine potential impact.

Defensive priority

Medium priority for network security teams to assess exposure and apply patches or workarounds.

Recommended defensive actions

• Assess exposure to the vulnerability and prioritize patching or applying workarounds
• Review network traffic processing and rule configurations to determine potential impact
• Apply patches or workarounds to vulnerable systems
• 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
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability is described in the CVE record and NVD vulnerability detail page. The issue requires a specific network traffic processing and a specific but not malicious rule. The fix is available in versions 7.0.16 and 8.0.5.

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.