CVE-2026-47738 liboqs: Uninitialized function-pointer dereference in OQS_KEM_encaps_derand for NTRU KEMs

liboqs is a C-language cryptographic library that provides implementations of post-quantum cryptography algorithms. Prior to 0.16.0, OQSKEMencapsderand can dereference an uninitialized encapsderand function pointer when called on NTRU-HPS-2048-509, NTRU-HPS-2048-677, NTRU-HPS-4096-821,...