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

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.

Scores

EPSS (exploitation in 30 days)

0.41% · top 65% of all CVEs (6 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

• CWE-416: Use After Free (opens in a new tab)All about CWE-416 and its CVEs

Affected products

• OISF · suricata

  • affected < 7.0.14
  • affected >= 8.0.0, < 8.0.3

References (5)

• https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5 (opens in a new tab)x_refsource_CONFIRM
• https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715 (opens in a new tab)x_refsource_MISC
• https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2 (opens in a new tab)x_refsource_MISC
• https://github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209b (opens in a new tab)x_refsource_MISC
• https://redmine.openinfosecfoundation.org/issues/8190 (opens in a new tab)x_refsource_MISC

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-22264](https://trackcve.app/badge/CVE-2026-22264.svg)](https://trackcve.app/cve/CVE-2026-22264)

Record last updated 28 Jan 2026, 14:02 UTC.