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CVE-2025-58187— Quadratic complexity when checking name constraints in crypto/x509

Quick assessment

Affected
Go standard library crypto/x509
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.

Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于名称约束检查算法设计缺陷，可能导致证书验证时间非线性增长。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking
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I. Basic Information for CVE-2025-58187

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Quadratic complexity when checking name constraints in crypto/x509
Source: CVE Program / CVE List V5
Vulnerability Description
Due to the design of the name constraint checking algorithm, the processing time of some inputs scale non-linearly with respect to the size of the certificate. This affects programs which validate arbitrary certificate chains.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Google Go 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Google Go是美国谷歌（Google）公司的一种静态强类型、编译型、并发型，并具有垃圾回收功能的编程语言。 Google Go存在安全漏洞，该漏洞源于名称约束检查算法设计缺陷，可能导致证书验证时间非线性增长。
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
Go standard library crypto/x509 0 ~ 1.24.9 -

II. Public POCs for CVE-2025-58187

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III. Intelligence Information for CVE-2025-58187

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Vendor Advisories for CVE-2025-58187 (1)

Same Patch Batch · Go standard library · 2025-10-29 · 10 CVEs total

CVE-2025-58186 Lack of limit when parsing cookies can cause memory exhaustion in net/http
CVE-2025-58183 Unbounded allocation when parsing GNU sparse map in archive/tar
CVE-2025-58188 Panic when validating certificates with DSA public keys in crypto/x509
CVE-2025-58189 ALPN negotiation error contains attacker controlled information in crypto/tls
CVE-2025-58185 Parsing DER payload can cause memory exhaustion in encoding/asn1
CVE-2025-47912 Insufficient validation of bracketed IPv6 hostnames in net/url
CVE-2025-61725 Excessive CPU consumption in ParseAddress in net/mail
CVE-2025-61724 Excessive CPU consumption in Reader.ReadResponse in net/textproto
CVE-2025-61723 Quadratic complexity when parsing some invalid inputs in encoding/pem

IV. Related Vulnerabilities

Same product: crypto/x509
Same vendor: Go standard library

V. Comments for CVE-2025-58187

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