CVE-2025-52473
mediumpriority · track · 22EPSS 0.002 · 14 %ileEURUUSEPSS · scored 2026-10-27
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.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
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affected products (3)
Products and version ranges known to be affected.
also known as (3)
Other names and identifiers for this entity.
sources
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references (9)
External citations — patches, advisories, analysis.
- https://access.redhat.com/security/cve/cve-2025-52473cnnvd
- https://github.com/open-quantum-safe/liboqs/commit/4215362acbf69b88fe1777c4c052f154e29f9897cnnvd
- https://github.com/open-quantum-safe/liboqs/releasesPatchcnnvd
- https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-qq3m-rq9v-jfgmcnnvd
- https://nvd.nist.gov/vuln/detail/CVE-2025-52473cnnvd
- https://github.com/open-quantum-safe/liboqs/commit/4215362acbf69b88fe1777c4c052f154e29f9897enisa_euvd
- https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-qq3m-rq9v-jfgmenisa_euvd
- https://github.com/open-quantum-safe/liboqs/commit/4215362acbf69b88fe1777c4c052f154e29f9897Patchnvd
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