{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "liboqs",
          "vendor": "open-quantum-safe",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 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"
}