VULNERABILITY INTELLIGENCE

CVE-2025-52473

CVSS score5.9 MEDIUM
EPSS probability0.24%
CISA KEVNot currently listed
Published2025-07-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

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.

Weakness classification

  • security-advisories@github.com: CWE-200
  • nvd@nist.gov: NVD-CWE-noinfo

Primary references