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CVE-2025-22866— Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec

Quick assessment

Affected
Go standard library crypto/internal/nistec
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ppc64le架构中使用变量时间指令，导致秘密标量位泄露。

AI Predicted 5.3 Difficulty: Hard EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1005 · Data from Local System
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I. Basic Information for CVE-2025-22866

Vulnerability Information
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Vulnerability Title
Timing sidechannel for P-256 on ppc64le in crypto/internal/nistec
Source: CVE Program / CVE List V5
Vulnerability Description
Due to the usage of a variable time instruction in the assembly implementation of an internal function, a small number of bits of secret scalars are leaked on the ppc64le architecture. Due to the way this function is used, we do not believe this leakage is enough to allow recovery of the private key when P-256 is used in any well known protocols.
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ppc64le架构中使用变量时间指令，导致秘密标量位泄露。
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/internal/nistec 0 ~ 1.22.12 -

II. Public POCs for CVE-2025-22866

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III. Intelligence Information for CVE-2025-22866

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Patches & Fixes for CVE-2025-22866 (2)

Vendor Advisories for CVE-2025-22866 (2)

IV. Related Vulnerabilities

Same product: crypto/internal/nistec
Same vendor: Go standard library

V. Comments for CVE-2025-22866

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