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CVE-2026-31937— Suricata dcerpc: quadratic complexity in dcerpc buffering

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 7.0.15之前版本存在安全漏洞，该漏洞源于DCERPC缓冲效率低下，可能导致性能下降。

CVSS 7.5 · High EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2026-31937

Vulnerability Information
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Vulnerability Title
Suricata dcerpc: quadratic complexity in dcerpc buffering
Source: CVE Program / CVE List V5
Vulnerability Description
Suricata is a network IDS, IPS and NSM engine. Prior to version 7.0.15, inefficiency in DCERPC buffering can lead to a performance degradation. This issue has been patched in version 7.0.15.
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
算法复杂性
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 7.0.15之前版本存在安全漏洞，该漏洞源于DCERPC缓冲效率低下，可能导致性能下降。
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 < 7.0.15 -

II. Public POCs for CVE-2026-31937

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III. Intelligence Information for CVE-2026-31937

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Vendor Advisories for CVE-2026-31937 (2)

Same Patch Batch · OISF · 2026-04-02 · 6 CVEs total

CVE-2026-31933 7.5 HIGH Suricata stream: quadratic complexity in stream inspection
CVE-2026-31932 7.5 HIGH Suricata krb5: quadratic complexity in krb5 buffering
CVE-2026-31931 7.5 HIGH Suricata tls: null dereference in tls.alpn rule keyword
CVE-2026-31934 7.5 HIGH Suricata smtp/mine: quadratic complexity in extracting urls
CVE-2026-31935 7.5 HIGH Suricata http2: unbounded resource consumption

IV. Related Vulnerabilities

Same product: suricata
Same vendor: OISF
Same weakness: CWE-407

V. Comments for CVE-2026-31937

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