CVE-2025-52473
Medium
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.
SeverityMedium
CVSS5.9
Exploit probability—
ProductOpenquantumsafe Liboqs
PublishedJul 10, 2025
First seenJul 10, 2025
Weakness typeCWE-200Sensitive information exposure
How to fix
Update
- openquantumsafe liboqs0.14.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| openquantumsafe liboqs | v < 0.14.0 | 0.14.0 |
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