{"id":"CVE-2026-0966","summary":"Libssh: libssh: denial of service via zero-length input in ssh_get_hexa()","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":"2026-05-28T04:11:16.276347632Z","published":"2026-03-26T20:06:28.313Z","related":["ALSA-2026:18160","ALSA-2026:18683","SUSE-SU-2026:0567-1","SUSE-SU-2026:0778-1","SUSE-SU-2026:0779-1","SUSE-SU-2026:1344-1","SUSE-SU-2026:1565-1","SUSE-SU-2026:20524-1","SUSE-SU-2026:20531-1","SUSE-SU-2026:21396-1","SUSE-SU-2026:21428-1","openSUSE-SU-2026:10203-1","openSUSE-SU-2026:20647-1"],"database_specific":{"cna_assigner":"redhat","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0966.json","cwe_ids":["CWE-124"]},"references":[{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://catalog.redhat.com/software/containers/"},{"type":"WEB","url":"https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:18160"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:18683"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:7067"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-0966"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/0xxx/CVE-2026-0966.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-0966"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433121"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://gitlab.com/libssh/libssh-mirror","events":[{"introduced":"0"},{"fixed":"ca9c055d7c78ce357346ac7c2b14047568d47aa1"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"0.11.4"}],"cpe":"cpe:2.3:a:libssh:libssh:*:*:*:*:*:*:*:*","source":"CPE_RANGE"}}],"versions":["libssh-0.11.3","libssh-0.11.2","libssh-0.11.1","libssh-0.11.0","libssh-0.8.0","release-0-3-0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-0966.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}