Unrated severityOSV Advisory· Published Jan 27, 2026· Updated Jan 28, 2026
Suricata detect/alert: heap-use-after-free on alert queue expansion
CVE-2026-22264
Description
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.
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Affected products
3Patches
Vulnerability mechanics
References
5- github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715mitrex_refsource_MISC
- github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2mitrex_refsource_MISC
- github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209bmitrex_refsource_MISC
- github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5mitrex_refsource_CONFIRM
- redmine.openinfosecfoundation.org/issues/8190mitrex_refsource_MISC
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