{"id":"DEBIAN-CVE-2026-77696","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.","modified":"2026-09-30T08:00:09.788109632Z","published":"2026-09-29T16:17:11.493Z","upstream":["CVE-2026-77696"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-77696"}],"affected":[{"package":{"name":"openssl","ecosystem":"Debian:12","purl":"pkg:deb/debian/openssl?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.10-1","3.0.10-1~deb12u1","3.0.11-1","3.0.11-1~deb12u1","3.0.11-1~deb12u2","3.0.12-1","3.0.12-2","3.0.13-1~deb12u1","3.0.13-1~deb12u2","3.0.14-1~deb12u1","3.0.14-1~deb12u2","3.0.15-1~deb12u1","3.0.16-1~deb12u1","3.0.17-1~deb12u1","3.0.17-1~deb12u2","3.0.17-1~deb12u3","3.0.18-1~deb12u1","3.0.18-1~deb12u2","3.0.19-1~deb12u1","3.0.19-1~deb12u2","3.0.20-1~deb12u1","3.0.20-1~deb12u2","3.0.22-1~deb12u1","3.0.9-1","3.1.0-1","3.1.1-1","3.1.2-1","3.1.3-1","3.1.4-1","3.1.4-2","3.1.5-1","3.1.5-1.1","3.1.5-1.1+hurd.1","3.2.0-1","3.2.0-2","3.2.1-1","3.2.1-1.1~exp1","3.2.1-2","3.2.1-3","3.2.2-1","3.3.0-1","3.3.0~beta1-1","3.3.1-1","3.3.1-2","3.3.1-5","3.3.1-6","3.3.1-7","3.3.2-1","3.3.2-2","3.4.0-1","3.4.0-2","3.4.0~~beta1-1","3.4.0~~beta1-2","3.4.1-1","3.5.0-1","3.5.0-2","3.5.0-3","3.5.0~~alpha1-1","3.5.0~~beta1-1","3.5.1-1","3.5.2-1","3.5.3-1","3.5.4-1","3.5.4-1~deb13u1","3.5.4-1~deb13u2","3.5.5-1","3.5.5-1~deb13u1","3.5.5-1~deb13u2","3.5.6-1~deb13u1","3.5.6-1~deb13u2","3.5.7-1~deb13u1","3.5.7-1~deb13u2","3.5.7-1~deb13u3","3.6.0-1","3.6.0-2","3.6.0~~alpha1-1","3.6.0~~beta1-1","3.6.1-1","3.6.1-2","3.6.1-3","3.6.2-1","3.6.3-1","3.6.4-1","3.6.5-1","4.0.0-1","4.0.0~alpha1-1","4.0.0~beta1-1","4.0.1-1","4.0.2-1","4.0.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77696.json"}},{"package":{"name":"openssl","ecosystem":"Debian:13","purl":"pkg:deb/debian/openssl?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.7-1~deb13u3"}]}],"versions":["3.5.1-1","3.5.1-1+deb13u1","3.5.2-1","3.5.3-1","3.5.4-1","3.5.4-1~deb13u1","3.5.4-1~deb13u2","3.5.5-1","3.5.5-1~deb13u1","3.5.5-1~deb13u2","3.5.6-1~deb13u1","3.5.6-1~deb13u2","3.5.7-1~deb13u1","3.5.7-1~deb13u2"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77696.json"}},{"package":{"name":"openssl","ecosystem":"Debian:14","purl":"pkg:deb/debian/openssl?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.5.1-1","3.5.2-1","3.5.3-1","3.5.4-1","3.5.4-1~deb13u1","3.5.4-1~deb13u2","3.5.5-1","3.5.5-1~deb13u1","3.5.5-1~deb13u2","3.5.6-1~deb13u1","3.5.6-1~deb13u2","3.5.7-1~deb13u1","3.5.7-1~deb13u2","3.5.7-1~deb13u3","3.6.0-1","3.6.0-2","3.6.0~~alpha1-1","3.6.0~~beta1-1","3.6.1-1","3.6.1-2","3.6.1-3","3.6.2-1","3.6.3-1","3.6.4-1","3.6.5-1","4.0.0-1","4.0.0~alpha1-1","4.0.0~beta1-1","4.0.1-1","4.0.2-1","4.0.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77696.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N"}]}