{"api_version":"1","generated_at":"2026-11-12T02:41:29+00:00","cve":"CVE-2026-47738","urls":{"html":"https://cve.report/CVE-2026-47738","api":"https://cve.report/api/cve/CVE-2026-47738.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-47738","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-47738"},"summary":{"title":"liboqs: Uninitialized function-pointer dereference in OQS_KEM_encaps_derand for NTRU KEMs","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-11-06 22:17:51","updated_at":"2026-11-06 22:17:51"},"problem_types":["CWE-824","CWE-824 CWE-824: Access of Uninitialized Pointer"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"5.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"5.3","severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","data":{"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"}}],"references":[{"url":"https://github.com/open-quantum-safe/liboqs/pull/2460","name":"https://github.com/open-quantum-safe/liboqs/pull/2460","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738","name":"https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b","name":"https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0","name":"https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-47738","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-47738","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"open-quantum-safe","product":"liboqs","version":"affected < 0.16.0","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"47738","cve":"CVE-2026-47738","epss":"0.003010000","percentile":"0.230230000","score_date":"2026-11-08","updated_at":"2026-11-09 00:01:53"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"liboqs","vendor":"open-quantum-safe","versions":[{"status":"affected","version":"< 0.16.0"}]}],"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."}],"metrics":[{"cvssV3_1":{"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-824","description":"CWE-824: Access of Uninitialized Pointer","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-06T21:23:45.399Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"references":[{"name":"https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738","tags":["x_refsource_CONFIRM"],"url":"https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738"},{"name":"https://github.com/open-quantum-safe/liboqs/pull/2460","tags":["x_refsource_MISC"],"url":"https://github.com/open-quantum-safe/liboqs/pull/2460"},{"name":"https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b","tags":["x_refsource_MISC"],"url":"https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b"},{"name":"https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0","tags":["x_refsource_MISC"],"url":"https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0"}],"source":{"advisory":"GHSA-jr5q-r9qx-v738","discovery":"UNKNOWN"},"title":"liboqs: Uninitialized function-pointer dereference in OQS_KEM_encaps_derand for NTRU KEMs"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-47738","datePublished":"2026-11-06T21:23:45.399Z","dateReserved":"2026-05-19T22:16:39.503Z","dateUpdated":"2026-11-06T21:23:45.399Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-06 22:17:51","lastModifiedDate":"2026-11-06 22:17:51","problem_types":["CWE-824","CWE-824 CWE-824: Access of Uninitialized Pointer"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"LOW"},"exploitabilityScore":3.9,"impactScore":1.4}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"47738","Ordinal":"1","Title":"liboqs: Uninitialized function-pointer dereference in OQS_KEM_en","CVE":"CVE-2026-47738","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"47738","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"liboqs: Uninitialized function-pointer dereference in OQS_KEM_en"}]}}}