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CVE-2026-22264— Suricata detect/alert: heap-use-after-free on alert queue expansion

Quick assessment

Affected
OISF suricata
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata 8.0.3之前版本和7.0.14之前版本存在资源管理错误漏洞，该漏洞源于生成单个数据包过多警报时可能发生无符号整数溢出，导致堆释放后重用。

CVSS 7.4 · High EPSS 0.40% · P32

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-22264

Vulnerability Information
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Vulnerability Title
Suricata detect/alert: heap-use-after-free on alert queue expansion
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Suricata 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Suricata是Open Information Security基金会的一个网络IDS、IPS和NSM引擎。 Suricata 8.0.3之前版本和7.0.14之前版本存在资源管理错误漏洞，该漏洞源于生成单个数据包过多警报时可能发生无符号整数溢出，导致堆释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
OISF suricata < 7.0.14 -

II. Public POCs for CVE-2026-22264

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III. Intelligence Information for CVE-2026-22264

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Patches & Fixes for CVE-2026-22264 (1)

Same Patch Batch · OISF · 2026-01-27 · 7 CVEs total

CVE-2026-22258 7.5 HIGH Suricata DCERPC: unbounded fragment buffering leads to memory exhaustion
CVE-2026-22260 7.5 HIGH Suricata http1: infinite recursion in decompression
CVE-2026-22259 7.5 HIGH Suricata dnp3: unbounded transaction growth
CVE-2026-22262 5.9 MEDIUM Suricata datasets: stack overflow when saving a set
CVE-2026-22263 5.3 MEDIUM Suricata http1: quadratic complexity in headers parsing over multiple packets
CVE-2026-22261 3.7 LOW Suricata eve/alert: http1 xff handling can lead to denial of service

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-416

V. Comments for CVE-2026-22264

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