ALPINE-CVE-2026-77696
- Source
- https://security.alpinelinux.org/vuln/CVE-2026-77696
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2026-77696.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/ALPINE-CVE-2026-77696
- Upstream
- Published
- 2026-09-29T16:17:11Z
- Modified
- 2026-09-30T11:30:04Z
- Severity
-
- 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
- Summary
- [none]
- Details
-
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.
- References