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CVE-2026-22259— Suricata dnp3: unbounded transaction growth

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之前版本存在安全漏洞，该漏洞源于解析特制DNP3流量时可能消耗大量内存，导致进程变慢、内存耗尽并被终止。

CVSS 7.5 · High EPSS 0.58% · P46
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I. Basic Information for CVE-2026-22259

Vulnerability Information
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Vulnerability Title
Suricata dnp3: unbounded transaction growth
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network IDS, IPS and NSM engine. Prior to versions 8.0.3 and 7.0.14, specially crafted traffic can cause Suricata to consume large amounts of memory while parsing DNP3 traffic. This can lead to the process slowing down and running out of memory, potentially leading to it getting killed by the OOM killer. Versions 8.0.3 or 7.0.14 contain a patch. As a workaround, disable the DNP3 parser in the suricata yaml (disabled by default).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未加控制的资源消耗(资源穷尽)
Source: CVE Program / CVE List V5
Vulnerability Title
Suricata 安全漏洞
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之前版本存在安全漏洞，该漏洞源于解析特制DNP3流量时可能消耗大量内存，导致进程变慢、内存耗尽并被终止。
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-2026-22259

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III. Intelligence Information for CVE-2026-22259

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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-2026-22264 7.4 HIGH Suricata detect/alert: heap-use-after-free on alert queue expansion
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-400

V. Comments for CVE-2026-22259

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