CVE-2025-52473 — liboqs secret-dependent branching in HQC reference implementation when compiled with Clang 17-20
liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Multiple secret-dependent branches have been identified in th…
Published: 2025-07-10 · CVSS: 5.9 · CVSS 3.1
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 · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7