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9.1
CRITICAL CVSS 3.1
CVE-2026-22264
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.

INFO

Published Date :

Jan. 27, 2026, 7:16 p.m.

Last Modified :

Jan. 29, 2026, 8:58 p.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Affected Products

The following products are affected by CVE-2026-22264 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Oisf suricata
: Total Affected Vendor : 1 | Products : 1
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH [email protected]
CVSS 3.1 CRITICAL [email protected]
Solution
Update Suricata to patch heap use-after-free from integer overflow.
  • Update Suricata to version 8.0.3 or later.
  • Update Suricata to version 7.0.14 or later.
  • Avoid running untrusted rulesets.
  • Limit signatures matching on a single packet.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-22264.

URL Resource
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
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-22264 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-22264 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-22264 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-22264 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jan. 29, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
    Added CPE Configuration OR *cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* versions up to (excluding) 7.0.14 *cpe:2.3:a:oisf:suricata:*:*:*:*:*:*:*:* versions from (including) 8.0.0 up to (excluding) 8.0.3
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2 Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209b Types: Patch
    Added Reference Type GitHub, Inc.: https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5 Types: Vendor Advisory
    Added Reference Type GitHub, Inc.: https://redmine.openinfosecfoundation.org/issues/8190 Types: Permissions Required
  • New CVE Received by [email protected]

    Jan. 27, 2026

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
    Added CWE CWE-416
    Added Reference https://github.com/OISF/suricata/commit/549d7bf60616de8e54686a188196453b5b22f715
    Added Reference https://github.com/OISF/suricata/commit/5789a3d3760dbf33d93fc56c27bd9529e5bdc8f2
    Added Reference https://github.com/OISF/suricata/commit/ac1eb394181530430fb7262969f423a1bf8f209b
    Added Reference https://github.com/OISF/suricata/security/advisories/GHSA-mqr8-m3m4-2hw5
    Added Reference https://redmine.openinfosecfoundation.org/issues/8190
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 9.1
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact