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CVE-2026-22258— Suricata DCERPC: unbounded fragment buffering leads to memory exhaustion

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DCERPC流量时缓冲区可能无限扩展，导致内存耗尽和进程终止。

CVSS 7.5 · High EPSS 0.55% · P44

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-22258

Vulnerability Information
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Vulnerability Title
Suricata DCERPC: unbounded fragment buffering leads to memory exhaustion
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, crafted DCERPC traffic can cause Suricata to expand a buffer w/o limits, leading to memory exhaustion and the process getting killed. While reported for DCERPC over UDP, it is believed that DCERPC over TCP and SMB are also vulnerable. DCERPC/TCP in the default configuration should not be vulnerable as the default stream depth is limited to 1MiB. Versions 8.0.3 and 7.0.14 contain a patch. Some workarounds are available. For DCERPC/UDP, disable the parser. For DCERPC/TCP, the `stream.reassembly.depth` setting will limit the amount of data that can be buffered. For DCERPC/SMB, the `stream.reassembly.depth` can be used as well, but is set to unlimited by default. Imposing a limit here may lead to loss of visibility in SMB.
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DCERPC流量时缓冲区可能无限扩展，导致内存耗尽和进程终止。
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-2026-22258

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III. Intelligence Information for CVE-2026-22258

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Vendor Advisories for CVE-2026-22258 (1)

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

CVE-2026-22260 7.5 HIGH Suricata http1: infinite recursion in decompression
CVE-2026-22259 7.5 HIGH Suricata dnp3: unbounded transaction growth
CVE-2026-22264 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-2026-22258

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