GHSA-W3G8-FP6J-WVQW SM2-PKE has 32-bit Biased Nonce Vulnerability

Summary A critical vulnerability exists in the SM2 Public Key Encryption PKE implementation where the ephemeral nonce k is generated with severely reduced entropy. A unit mismatch error causes the nonce generation function to request only 32 bits of randomness instead of the expected 256 bits. Th...