CVE-2026-57223: 
Suricata Schwachstellenanalyse und -minderung

CVE-2026-57223 is a vulnerability in Suricata, the open-source network intrusion detection and prevention system, involving excessive resource consumption triggered by specially crafted protocol data. It affects Suricata versions 7.x prior to 7.0.17 and 8.x prior to 8.0.6, and can degrade performance or cause a denial of service. The CVE is currently in "Reserved" status, and the estimated severity is Medium, with a CWE classification of CWE-190 (Integer Overflow or Wraparound) (Feedly, Tenable).

The root cause is classified as CWE-190 (Integer Overflow or Wraparound), mapped to CAPEC-92 (Forced Integer Overflow). An attacker can send specially crafted protocol data to a Suricata-monitored network segment, triggering an integer overflow condition that leads to excessive resource consumption. No authentication or special privileges appear to be required for exploitation, as the attack vector is network-based and targets traffic inspection logic (Feedly).

Successful exploitation results in excessive CPU or memory consumption within the Suricata process, degrading its ability to inspect network traffic and potentially causing a complete denial of service. This could allow malicious traffic to pass uninspected during the outage window, undermining the security posture of affected networks. Availability is the primary impact, with indirect confidentiality and integrity risks arising from the loss of IDS/IPS coverage (Feedly).

No public proof-of-concept exploit code or in-the-wild exploitation has been reported for CVE-2026-57223 as of the latest available data. The CVE remains in "Reserved" status, and no CISA KEV catalog listing or threat actor attribution has been identified. Detection coverage has been added by Tenable via Nessus plugins (IDs 330413 and 344719), indicating the vulnerability is recognized by the security tooling community (Tenable, Tenable).

Users should upgrade Suricata to version 7.0.17 or later (for the 7.x branch) or 8.0.6 or later (for the 8.x branch) to remediate this vulnerability. If immediate upgrading is not possible, consider restricting the types of protocol traffic processed by Suricata or deploying upstream rate-limiting to reduce exposure to crafted protocol data. Monitor Suricata process resource utilization for anomalous spikes as a compensating control (Feedly).