CVE-2026-54872

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872 Timing Side-Channel in Scalar Multiplication for Non-NIST EC Curves

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

EUVD-2026-89004

Issue summary: The generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations with curves that do not have a dedicated implementation leaks information about the secret nonce through timing. Impact summary: An attacker able to measure signing times may learn...

CVE-2026-54872

A timing side-channel vulnerability exists in OpenSSL 's generic elliptic-curve scalar multiplication used for ECDSA and SM2 signature operations. The flaw occurs because the generic implementation uses non-constant-time BIGNUM operations to pad secret scalars for curves lacking a dedicated const...