Critical severity · published Jan 27, 2026
CVE-2026-22264
Suricata is a network IDS, IPS and NSM engine
9.1
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
Suricata · Oisf
before 7.0.14; 8.0.0 before 8.0.3 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-22264
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-22264
Patch
https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715
Patch
https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2
Patch
https://github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209b
Vendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5
Permissions Required
https://redmine.openinfosecfoundation.org/issues/8190
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