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Vulnerability · Published Sep 18, 2026 · Assigned by GitHub_M

CVE-2026-57222Suricata ippair: hash collision can cause incorrect state reuse across IPv4 and IPv6

Medium 5.3

In plain English

A medium-severity security flaw in suricata from OISF. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.3Medium
Exploit odds (30 days)0.4%top 61.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13suricatano fix listedDEBIAN-CVE-2026-57222
Debian:14suricata1:8.0.6-1DEBIAN-CVE-2026-57222
Ubuntu:22.04:LTSsuricatano fix listedUBUNTU-CVE-2026-57222
Ubuntu:24.04:LTSsuricatano fix listedUBUNTU-CVE-2026-57222
Ubuntu:26.04:LTSsuricatano fix listedUBUNTU-CVE-2026-57222

Affected products (as reported)

VendorProductVersions
OISF suricata >= 8.0.0, < 8.0.6< 7.0.17

Weakness: CWE-697 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References