CVE-2024-42098 addresses a vulnerability in the Linux kernel's elliptic curve Diffie-Hellman (ECDH) cryptographic implementation. The issue involves incomplete zeroization of the private_key buffer when it is overwritten by a shorter key, potentially leaving residual key material in memory. The patch explicitly zeroizes the entire private_key array before use, ensuring no leftover key data remains. This change also modifies behavior so that the private_key is zeroized even if key generation fails, improving security consistency.