CVE-2025-52473— liboqs secret-dependent branching in HQC reference implementation when compiled with Clang 17-20
Quick assessment
Affected
open-quantum-safe liboqs
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.
liboqs是Open Quantum Safe开源的一个用于量子安全加密算法的开源 C 库。 liboqs 0.14.0之前版本存在信息泄露漏洞，该漏洞源于HQC密钥封装机制存在秘密依赖分支。
Possible ATT&CK Techniques 1 AI
T1213 · Data from Information Repositories
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I. Basic Information for CVE-2025-52473
Vulnerability Information
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Vulnerability Title
liboqs secret-dependent branching in HQC reference implementation when compiled with Clang 17-20
Source: CVE Program / CVE List V5
Vulnerability Description
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Multiple secret-dependent branches have been identified in the reference implementation of the HQC key encapsulation mechanism when it is compiled with Clang for optimization levels above -O0 (-O1, -O2, etc). A proof-of-concept local attack exploits this secret-dependent information to recover the entire secret key. This vulnerability is fixed in 0.14.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
liboqs 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
liboqs是Open Quantum Safe开源的一个用于量子安全加密算法的开源 C 库。 liboqs 0.14.0之前版本存在信息泄露漏洞，该漏洞源于HQC密钥封装机制存在秘密依赖分支。
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 |
|---|---|---|---|---|
| open-quantum-safe | liboqs | < 0.14.0 | - |
|
II. Public POCs for CVE-2025-52473
| # | POC Description | Source Link | Shenlong Link |
|---|
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V. Comments for CVE-2025-52473
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