Allocation of Resources Without Limits or Throttling in Suricata - #VU152932
Published: September 30, 2026
Vulnerability identifier: #VU152932
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-770
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in Suricata's per-thread decision cache when processing high-cardinality traffic matching IPv4 signatures configured with source- or destination-tracked limit or both thresholds. A remote attacker can send high-cardinality traffic to exhaust memory and terminate Suricata.
In inline deployments, traffic forwarding may be interrupted.
Affected software
Suricata
Remediation
Install security update from vendor's website.
Suricata - update to 8.0.7