CVE-2026-22264: Oisf Suricata

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• Oisf Suricata: before 7.0.14 (fixed in 7.0.14); from 8.0.0, before 8.0.3 (fixed in 8.0.3)

Published 2026-01-27. Last modified 2026-06-17.