Platform
linux
Component
suricata
Fixed in
7.0.16
8.0.1
CVE-2026-31932 describes an inefficiency in KRB5 buffering within Suricata, a network IDS/IPS/NSM engine. This can lead to significant performance degradation, potentially resulting in a denial-of-service (DoS) condition. This issue affects Suricata versions 8.0.0 and prior, up to but not including 8.0.4. The vulnerability has been addressed in Suricata versions 7.0.15 and 8.0.4.
CVE-2026-31932 in Suricata, a network IDS, IPS, and NSM engine, affects versions prior to 7.0.15 and 8.0.4. It stems from an inefficiency in KRB5 buffering, which can lead to significant performance degradation. While no active real-world exploitation is known, the accumulation of data in the buffer can strain system resources, particularly in environments with high Kerberos traffic volume. This could manifest as slow packet inspection, increased latency, and, in extreme cases, system instability. The CVSS severity is 7.5, indicating a moderately high risk. Updating Suricata is crucial to mitigate this issue and maintain network security and performance.
Although no active exploitation of CVE-2026-31932 has been documented, the vulnerability resides in KRB5 data handling. An attacker could potentially design a denial-of-service (DoS) attack by sending a large volume of malicious Kerberos traffic to saturate the buffer and cause performance degradation. The probability of direct exploitation is low, but the potential impact on system availability is significant. The lack of public exploits does not diminish the importance of applying the fix, as vulnerabilities can be exploited in the future.
Exploit Status
EPSS
0.05% (16% percentile)
CISA SSVC
The solution for CVE-2026-31932 is to update Suricata to version 7.0.15 or higher, or to version 8.0.4 or higher. These versions include a fix that optimizes KRB5 buffer handling, eliminating the inefficiency causing performance degradation. It is recommended to apply this update as soon as possible, especially in environments where Suricata is used to protect critical networks or sensitive systems. Before applying the update, it is advisable to back up your Suricata configuration and test the new version in a test environment to ensure compatibility and avoid unexpected disruptions. The update can be performed following the installation instructions provided by Suricata.
Actualice Suricata a la versión 7.0.15 o superior, o a la versión 8.0.4 o superior, según corresponda a su rama de versión. Esto solucionará la ineficiencia en el buffering KRB5 que puede causar degradación del rendimiento.
Vulnerability analysis and critical alerts directly to your inbox.
Suricata is an open-source Intrusion Detection System/Intrusion Prevention System (IDS/IPS) and Network Security Monitoring (NSM) engine.
The update corrects a vulnerability that can cause performance degradation and potentially enable denial-of-service attacks.
Versions prior to 7.0.15 and 8.0.4 are vulnerable.
Follow the installation instructions provided by Suricata on their official website.
Back up your Suricata configuration and test the new version in a test environment.
CVSS Vector
Upload your dependency file and we'll tell you instantly if this and other CVEs hit you.