{"id":"CVE-2026-47738","published":"2026-11-06T22:17:51.630","lastModified":"2026-11-09T23:17:22.947","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.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-824"],"vendors":[],"products":[],"references":[{"url":"https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b","tags":[]},{"url":"https://github.com/open-quantum-safe/liboqs/pull/2460","tags":[]},{"url":"https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0","tags":[]},{"url":"https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738","tags":[]}],"exploitRefs":[{"url":"https://github.com/open-quantum-safe/liboqs/commit/80ceff0207658eba98bae8eb22ca3aa2a364f40b","tags":[]},{"url":"https://github.com/open-quantum-safe/liboqs/pull/2460","tags":[]},{"url":"https://github.com/open-quantum-safe/liboqs/releases/tag/0.16.0","tags":[]},{"url":"https://github.com/open-quantum-safe/liboqs/security/advisories/GHSA-jr5q-r9qx-v738","tags":[]}],"hasPoc":true,"ai":null}