CVE-2026-22264 HIGH

CVE-2026-22264: Suricata detect/alert: heap-use-after-free on alert queue expansion

Vendor Oisf
Product suricata
Weakness CWE-416
Published January 27, 2026
Last update January 28, 2026

CVSS base score

7.4/10
Attack vector Network
Attack complexity High
Privileges required None
User interaction None
Confidentiality None
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H

What the vulnerability does

01Description

Suricata is a network IDS, IPS and NSM engine. Prior to version 8.0.3 and 7.0.14, an unsigned integer overflow can lead to a heap use-after-free condition when generating excessive amounts of alerts for a single packet. Versions 8.0.3 and 7.0.14 contain a patch. As a workaround, do not run untrusted rulesets or run with less than 65536 signatures that can match on the same packet.

Key dates

02Disclosure timeline

January 27, 2026 CVE published
January 28, 2026 Record updated