CVE-2025-48946— liboqs affected by theoretical design flaw in HQC
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I. Basic Information for CVE-2025-48946
Vulnerability Information
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Vulnerability Title
liboqs affected by theoretical design flaw in HQC
Source: NVD (National Vulnerability Database)
Vulnerability Description
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. liboqs prior to version 0.13.0 supports the HQC algorithm, an algorithm with a theoretical design flaw which leads to large numbers of malformed ciphertexts sharing the same implicit rejection value. Currently, no concrete attack on the algorithm is known. However, prospective users of HQC must take extra care when using the algorithm in protocols involving key derivation. In particular, HQC does not provide the same security guarantees as Kyber or ML-KEM. There is currently no patch for the HQC flaw available in liboqs, so HQC is disabled by default in liboqs starting from version 0.13.0. OQS will update its implementation after the HQC team releases an updated algorithm specification.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
使用已被攻破或存在风险的密码学算法
Source: NVD (National Vulnerability Database)
Vulnerability Title
liboqs 加密问题漏洞
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 0.13.0之前版本存在加密问题漏洞，该漏洞源于HQC算法存在设计缺陷，可能导致大量畸形密文共享相同的隐式拒绝值。
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 | < 0.13.0 | - |
II. Public POCs for CVE-2025-48946
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
Same vendor: open-quantum-safe
Same weakness: CWE-327
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V. Comments for CVE-2025-48946
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