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Esto podr\u00eda activarse de forma remota cuando el servidor permite la autenticaci\u00f3n GSSAPI y la verbosidad del registro se establece al menos en SSH_LOG_PACKET (3). Esto podr\u00eda causar un auto-DoS del proceso demonio por conexi\u00f3n."}], "id": "CVE-2026-0966", "lastModified": "2026-09-01T12:17:33.740", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 4.2, "source": "secalert@redhat.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-0966", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-27T19:52:22.819171Z", "version": "2.0.3"}}]}, "published": "2026-03-26T21:17:00.783", "references": [{"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:18160"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2026:18683"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://access.redhat.com/errata/RHSA-2026:7067"}, {"source": "secalert@redhat.com", "tags": ["Mitigation", "Vendor Advisory"], "url": "https://access.redhat.com/security/cve/CVE-2026-0966"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433121"}, {"source": "secalert@redhat.com", "tags": ["Release Notes"], "url": "https://www.libssh.org/2026/02/10/libssh-0-12-0-and-0-11-4-security-releases/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-124"}], "source": "secalert@redhat.com", "type": "Secondary"}]}

{"acknowledgement": "Red Hat would like to thank Jakub Jelen (libssh), Jun Xu, Kang Yang, and Yunhang Zhang for reporting this issue.", "bugzilla": {"description": "libssh: Buffer underflow in ssh_get_hexa() on invalid input", "id": "2433121", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2433121"}, "csaw": false, "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, consider disabling GSSAPI authentication if it is not required, or reduce the `LogLevel` in the `sshd_config` file to a value lower than `SSH_LOG_PACKET` (e.g., `INFO`).\nTo disable GSSAPI authentication, add or modify the following line in `/etc/ssh/sshd_config`:\n`GSSAPIAuthentication no`\nTo reduce logging verbosity, add or modify the following line in `/etc/ssh/sshd_config`:\n`LogLevel INFO`\nAfter making changes to `sshd_config`, the `sshd` service must be restarted for the changes to take effect. This may temporarily interrupt active SSH sessions."}, "name": "CVE-2026-0966", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "libssh", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "libssh2", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "libssh2", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "libssh", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "libssh", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "rhcos", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-02-10T18:47:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-0966\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-0966"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "product": "libssh", "vendor": "libssh"}], "created": "2026-02-16T12:03:34.212426+00:00", "updated": "2026-05-11T18:00:14.301166+00:00", "vendors": ["libssh", "libssh$PRODUCT$libssh"]}