{"id":"USN-8051-1","summary":"libssh vulnerabilities","details":"It was discovered that libssh clients incorrectly handled the key exchange\nprocess. A remote attacker could possibly use this issue to cause libssh\nclients to crash, resulting in a denial of service. (CVE-2025-8277)\n\nIt was discovered that the libssh SCP client incorrectly sanitized paths\nreceived from servers. A remote attacker could use this issue to cause\nlibssh SCP clients to overwrite files outside of the working directory and\npossibly execute arbitrary code. (CVE-2026-0964)\n\nIt was discovered that libssh incorrectly handled parsing configuration\nfiles. A local attacker could possibly use this issue to cause libssh to\naccess non-regular files, resulting in a denial of service. (CVE-2026-0965)\n\nIt was discovered that libssh incorrectly handled the ssh_get_hexa()\nfunction. A remote attacker could possibly use this issue to cause libssh\nto crash, resulting in a denial of service. (CVE-2026-0966)\n\nIt was discovered that libssh incorrectly handled certain regular\nexpressions. A local attacker could possibly use this issue to cause libssh\nto consume resources, resulting in a denial of service. (CVE-2026-0967)\n\nIt was discovered that the libssh SFTP client incorrectly handled certain\nmalformed longname fields. A remote attacker could use this issue to cause\nlibssh SFTP clients to crash, resulting in a denial of service, or possibly\nexecute arbitrary code. (CVE-2026-0968)","modified":"2026-05-14T12:17:22.822455168Z","published":"2026-02-18T13:14:15Z","related":["UBUNTU-CVE-2025-8277","UBUNTU-CVE-2026-0964","UBUNTU-CVE-2026-0965","UBUNTU-CVE-2026-0966","UBUNTU-CVE-2026-0967","UBUNTU-CVE-2026-0968"],"upstream":["UBUNTU-CVE-2025-8277","UBUNTU-CVE-2026-0964","UBUNTU-CVE-2026-0965","UBUNTU-CVE-2026-0966","UBUNTU-CVE-2026-0967","UBUNTU-CVE-2026-0968"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8051-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-8277"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0964"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0965"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0966"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0967"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-0968"}],"affected":[{"package":{"name":"libssh","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libssh?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.9.6-2ubuntu0.22.04.6"}]}],"versions":["0.9.6-1","0.9.6-1build1","0.9.6-2","0.9.6-2build1","0.9.6-2ubuntu0.22.04.1","0.9.6-2ubuntu0.22.04.2","0.9.6-2ubuntu0.22.04.3","0.9.6-2ubuntu0.22.04.4","0.9.6-2ubuntu0.22.04.5"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"0.9.6-2ubuntu0.22.04.6","binary_name":"libssh-4"},{"binary_version":"0.9.6-2ubuntu0.22.04.6","binary_name":"libssh-gcrypt-4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8051-1.json","cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2025-8277","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"score":"low","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-0964"},{"id":"CVE-2026-0965","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2026-0966"},{"id":"CVE-2026-0967","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-0968","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"score":"medium","type":"Ubuntu"}]}]}}},{"package":{"name":"libssh","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libssh?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.10.6-2ubuntu0.3"}]}],"versions":["0.10.5-3ubuntu1","0.10.5-3ubuntu2","0.10.6-2","0.10.6-2build1","0.10.6-2build2","0.10.6-2ubuntu0.1","0.10.6-2ubuntu0.2"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssh-4","binary_version":"0.10.6-2ubuntu0.3"},{"binary_name":"libssh-gcrypt-4","binary_version":"0.10.6-2ubuntu0.3"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"id":"CVE-2025-8277","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2026-0964","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-0965","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2026-0966","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"Ubuntu","score":"low"}]},{"id":"CVE-2026-0967","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-0968"}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8051-1.json"}},{"package":{"name":"libssh","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libssh?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.11.2-1ubuntu0.2"}]}],"versions":["0.11.1-1","0.11.1-2","0.11.2-1","0.11.2-1build1","0.11.2-1ubuntu0.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libssh-4","binary_version":"0.11.2-1ubuntu0.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8051-1.json","cves_map":{"ecosystem":"Ubuntu:25.10","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"low"}],"id":"CVE-2025-8277"},{"id":"CVE-2026-0964","severity":[{"score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2026-0965"},{"id":"CVE-2026-0966","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"},{"score":"low","type":"Ubuntu"}]},{"id":"CVE-2026-0967","severity":[{"score":"CVSS:3.0/AV:L/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-0968"}]}}}],"schema_version":"1.7.5"}