Allocation of Resources Without Limits or Throttling in Suricata - CVE-2026-57224
Published: July 22, 2026
Vulnerability identifier: #VU139044
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-57224
CWE-ID: CWE-770
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Open Information Security Foundation
Affected software:
Suricata
Suricata
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the DHCP application-layer parser when processing DHCP flows where only one direction is seen by the sensor. A remote attacker can send traffic that creates completed transactions that are never freed to cause a denial of service.
As the per-flow transaction list grows without bound, per-packet transaction cleanup becomes increasingly expensive.
How to mitigate CVE-2026-57224
Install security update from vendor's website.