{"id":"DEBIAN-CVE-2026-0966","details":"A flaw was found in libssh. The API function `ssh_get_hexa()` is vulnerable to a denial of service when processing zero-length input. This can be exploited remotely by an attacker during GSSAPI (Generic Security Service Application Program Interface) authentication if the server's logging verbosity is set to `SSH_LOG_PACKET (3)` or higher. Successful exploitation could lead to a self-Denial of Service of the per-connection daemon process.","modified":"2026-09-29T13:00:19.252446709Z","published":"2026-03-26T21:17:00.783Z","upstream":["CVE-2026-0966"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-0966"}],"affected":[{"package":{"name":"libssh","ecosystem":"Debian:12","purl":"pkg:deb/debian/libssh?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.10.5-2","0.10.5-3","0.10.5-3+hurd.1","0.10.6-0+deb12u1","0.10.6-0+deb12u2","0.10.6-1","0.10.6-2","0.10.6-3","0.11.1-1","0.11.1-2","0.11.2-1","0.11.3-1","0.12.0-1","0.12.0-2","0.12.0-3","0.12.1-1","0.12.2-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-0966.json"}},{"package":{"name":"libssh","ecosystem":"Debian:13","purl":"pkg:deb/debian/libssh?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.11.5-0+deb13u1"}]}],"versions":["0.11.2-1","0.11.2-1+deb13u1","0.11.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-0966.json"}},{"package":{"name":"libssh","ecosystem":"Debian:14","purl":"pkg:deb/debian/libssh?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.12.0-1"}]}],"versions":["0.11.2-1","0.11.3-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-0966.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}