CVE-2026-47738

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{"affected": [{"affectedData": [{"product": "liboqs", "vendor": "open-quantum-safe", "versions": [{"status": "affected", "version": "< 0.16.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, OQS_KEM_encaps_derand can dereference an uninitialized encaps_derand function pointer when called on NTRU-HPS-2048-509, NTRU-HPS-2048-677, NTRU-HPS-4096-821, NTRU-HPS-4096-1229, NTRU-HRSS-701, or NTRU-HRSS-1373. The affected NTRU constructors omit the OQS_KEM.encaps_derand member because those schemes do not support derandomized encapsulation, OQS_KEM objects are allocated without zero initialization, and the wrapper in src/kem/kem.c checks only that the OQS_KEM pointer is non-null before calling through the residual heap value. An application is affected only if it instantiates one of those six NTRU KEMs and invokes OQS_KEM_encaps_derand on it. The supported impact is a calling-process crash and denial of service. This issue is fixed in version 0.16.0."}], "id": "CVE-2026-47738", "lastModified": "2026-11-12T22:18:35.610", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47738", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-09T22:36:51.048997Z", "version": "2.0.3"}}]}, "published": "2026-11-06T22:17:51.630", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-quantum-safe/liboqs/pull/2460"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-824"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.16.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "liboqs", "source": "cna", "vendor": "open-quantum-safe"}, "product": "liboqs", "vendor": "open_quantum_safe"}], "created": "2026-11-06T22:45:11.627442+00:00", "updated": "2026-11-06T23:00:11.214062+00:00", "vendors": ["open_quantum_safe", "open_quantum_safe$PRODUCT$liboqs"]}