ALPINE-CVE-2026-77696

ALPINE-CVE-2026-77696

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Issue summary: SM2 signature generation uses non-constant-time arithmetic on secret values, forming a timing side-channel. Impact summary: An attacker able to measure SM2 signing times may learn information about the per-signature secret nonce, which over many signatures can, via a lattice / Hidden Number Problem attack, lead to recovery of the private key. CWE: CWE-208: Observable Timing Discrepancy Description: SM2 signature generation computes the signature value using variable-time BIGNUM operations on the secret nonce and the private key, so the time taken to produce an SM2 signature depends on these secret values, forming a timing side-channel. Applications performing SM2 signature generation are affected on all platforms. FIPS Impact: no SM2 is not a FIPS algorithm.

CVSS 3.7 · Low · Fix available

Published

2026-09-29T16:17:11.493Z

Updated

2026-10-08T09:30:02.599218412Z

Stack: system · network

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