CVE-2024-54137: Openquantumsafe Liboqs

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. A correctness error has been identified in the reference implementation of the HQC key encapsulation mechanism. Due to an indexing error, part of the secret key is incorrectly treated as non-secret data. This results in an incorrect shared secret value being returned when the decapsulation function is called with a malformed ciphertext. This vulnerability is fixed in 0.12.0.

Affected products

• Openquantumsafe Liboqs: before 0.12.0 (fixed in 0.12.0)

Published 2024-12-06. Last modified 2026-06-17.