Medium severity · published Sep 18, 2026
CVE-2026-57222
Suricata ippair: hash collision can cause incorrect state reuse across IPv4 and IPv6
5.3
CVSS
0.4%
EPSS
No
On KEV
Description
Suricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.17 and 8.0.6, crafted IPv4 and IPv6 address pairs can collide in the IPPair hash because src/ippair.c did not compare the IP address family before reusing IPPair-backed state. This can apply state from one IP family to another for xbits track ip_pair, FTP data expectations, and, on the 7.0 release line, thresholding, detection_filter, and rate_filter rules using track by_both, causing incorrect detection state. This issue is fixed in versions 8.0.6 and 7.0.17.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 38% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SU
suricata · OISF
>= 8.0.0, < 8.0.6; < 7.0.17 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-57222
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-57222
Patch
https://github.com/OISF/suricata/commit/4a728464e6eb9e273bb02e3df0c28929b28db71d
Patch
https://github.com/OISF/suricata/commit/9d788575c5d22a34eeed50d56557ed12b05e0aec
Patch
https://github.com/OISF/suricata/commit/c92e270c4a795c52bce610aa1ce9ebaf065c49e6
Release Notes
https://github.com/OISF/suricata/releases/tag/suricata-7.0.17
Release Notes
https://github.com/OISF/suricata/releases/tag/suricata-8.0.6
Vendor Advisory
https://github.com/OISF/suricata/security/advisories/GHSA-2r8x-23fw-hgcg
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