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Vulnerability record · CVE-2026-22264 · published 27 January 2026

CVE-2026-22264: Oisf suricata use after free vulnerability

Oisf · Suricata

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.

9.1 CVSS 3.1 Critical EPSS 0.40% · top 68.1% CWE-416 · Use after free
9.1CVSS 3.1 base score
0.40%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715 Patch
https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2 Patch
https://github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209b Patch
https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5 Vendor Advisory
https://redmine.openinfosecfoundation.org/issues/8190 Permissions Required

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-22262Oisf suricata stack-based buffer overflow vulnerabilitySuricata is a network IDS, IPS and NSM engine. While saving a dataset a stack buffer is used to prepare the data. Prior to versions 8.0.3 and 7.0.14,…EPSS 0.55%9.8CVE-2023-35853Oisf suricata code injection vulnerabilityIn Suricata before 6.0.13, an adversary who controls an external source of Lua rules may be able to execute Lua code. This is addressed in 6.0.13 by …EPSS 1.0%9.8CVE-2021-37592Oisf suricata out-of-bounds write vulnerabilitySuricata before 5.0.8 and 6.x before 6.0.4 allows TCP evasion via a client with a crafted TCP/IP stack that can send a certain sequence of segments.EPSS 1.6%9.8CVE-2018-10244Oisf suricata integer overflow vulnerabilitySuricata version 4.0.4 incorrectly handles the parsing of an EtherNet/IP PDU. A malformed PDU can cause the parsing code to read beyond the allocated…EPSS 1.7%9.1CVE-2026-45764Oisf suricata type confusion vulnerabilitySuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to versions 7.0.16 and 8.…EPSS 0.63%9.1CVE-2019-18792Oisf suricata interpretation conflict vulnerabilityAn issue was discovered in Suricata 5.0.0. It is possible to bypass/evade any tcp based signature by overlapping a TCP segment with a fake FIN packet…EPSS 2.5%8.1CVE-2024-23839Oisf suricata use after free vulnerabilitySuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Prior to 7.0.3, specially craft…EPSS 0.78%7.5CVE-2026-45770Oisf suricata out-of-bounds write vulnerabilitySuricata is a network Intrusion Detection System, Intrusion Prevention System and Network Security Monitoring engine. Starting in version 8.0.0 and p…EPSS 0.48%

Source: NIST National Vulnerability Database (record CVE-2026-22264), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.