{"id":"USN-8928-1","summary":"openssh vulnerabilities","details":"It was discovered that OpenSSH's sftp client incorrectly handled paths\nreturned by the server during a recursive copy operation. A remote\nattacker controlling the server could possibly use this issue to write\nfiles to unintended locations. (CVE-2026-106552)\n\nIt was discovered that OpenSSH's sshd server incorrectly handled\nGSSAPIAuthentication state across authentication attempts. An attacker\ncould possibly use this issue to obtain credentials from a previous\nfailed authentication attempt. (CVE-2026-106553, CVE-2026-106555)\n\nIt was discovered that OpenSSH incorrectly used an LZ77 dictionary coder\nduring compression. An attacker could possibly use this issue to obtain\nsensitive information. (CVE-2026-106582)\n\nIt was discovered that OpenSSH's ssh client incorrectly allowed special\ncharacters in command-line usernames. An attacker could possibly use this\nissue to inject arbitrary commands via specially crafted usernames.\n(CVE-2026-106583)\n\nIt was discovered that OpenSSH's ssh-keygen incorrectly handled Daylight\nSaving Time when converting dates. An attacker could possibly use this\nissue to cause certificates to have incorrect expiration times.\n(CVE-2026-106584)\n\nIt was discovered that OpenSSH did not check whether the maximum packet\nlength was exceeded during decompression. A remote attacker could possibly\nuse this issue to cause a denial of service. (CVE-2026-106585)\n\nIt was discovered that OpenSSH's sshd server incorrectly applied the\nrestrict keyword from authorized_keys to tunnel forwarding requests. A\nlocal attacker with an authorized key could possibly use this issue to\nbypass intended tunnel forwarding restrictions. (CVE-2026-106586)\n\nIt was discovered that OpenSSH's sshd server incorrectly handled certain\nconfiguration options that accept a \"none\" value. An attacker could\npossibly use this issue to cause OpenSSH to behave unexpectedly.\n(CVE-2026-106587)","modified":"2026-10-17T13:11:54.038235995Z","published":"2026-10-14T12:13:18Z","related":["UBUNTU-CVE-2026-106552","UBUNTU-CVE-2026-106553","UBUNTU-CVE-2026-106555","UBUNTU-CVE-2026-106582","UBUNTU-CVE-2026-106583","UBUNTU-CVE-2026-106584","UBUNTU-CVE-2026-106585","UBUNTU-CVE-2026-106586","UBUNTU-CVE-2026-106587"],"upstream":["CVE-2026-106552","CVE-2026-106553","CVE-2026-106555","CVE-2026-106582","CVE-2026-106583","CVE-2026-106584","CVE-2026-106585","CVE-2026-106586","CVE-2026-106587","UBUNTU-CVE-2026-106552","UBUNTU-CVE-2026-106553","UBUNTU-CVE-2026-106555","UBUNTU-CVE-2026-106582","UBUNTU-CVE-2026-106583","UBUNTU-CVE-2026-106584","UBUNTU-CVE-2026-106585","UBUNTU-CVE-2026-106586","UBUNTU-CVE-2026-106587"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8928-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106552"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106553"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106555"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106582"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106583"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106584"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106585"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106586"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-106587"}],"affected":[{"package":{"name":"openssh","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/openssh?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:8.9p1-3ubuntu0.18"}]}],"versions":["1:8.4p1-6ubuntu2","1:8.7p1-2","1:8.7p1-2build1","1:8.7p1-4","1:8.8p1-1","1:8.9p1-3","1:8.9p1-3ubuntu0.1","1:8.9p1-3ubuntu0.3","1:8.9p1-3ubuntu0.4","1:8.9p1-3ubuntu0.5","1:8.9p1-3ubuntu0.6","1:8.9p1-3ubuntu0.7","1:8.9p1-3ubuntu0.10","1:8.9p1-3ubuntu0.11","1:8.9p1-3ubuntu0.13","1:8.9p1-3ubuntu0.14","1:8.9p1-3ubuntu0.15","1:8.9p1-3ubuntu0.16","1:8.9p1-3ubuntu0.17"],"ecosystem_specific":{"binaries":[{"binary_version":"1:8.9p1-3ubuntu0.18","binary_name":"openssh-client"},{"binary_version":"1:8.9p1-3ubuntu0.18","binary_name":"openssh-server"},{"binary_name":"openssh-sftp-server","binary_version":"1:8.9p1-3ubuntu0.18"},{"binary_version":"1:8.9p1-3ubuntu0.18","binary_name":"openssh-tests"},{"binary_name":"ssh","binary_version":"1:8.9p1-3ubuntu0.18"},{"binary_version":"1:8.9p1-3ubuntu0.18","binary_name":"ssh-askpass-gnome"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:22.04:LTS","cves":[{"id":"CVE-2026-106552","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106553"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106555"},{"id":"CVE-2026-106582","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106583"},{"id":"CVE-2026-106584","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106585"},{"id":"CVE-2026-106586","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-106587","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8928-1.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/openssh?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.6p1-3ubuntu13.20"}]}],"versions":["1:9.3p1-1ubuntu3","1:9.4p1-1ubuntu1","1:9.6p1-3ubuntu1","1:9.6p1-3ubuntu2","1:9.6p1-3ubuntu11","1:9.6p1-3ubuntu12","1:9.6p1-3ubuntu13","1:9.6p1-3ubuntu13.3","1:9.6p1-3ubuntu13.4","1:9.6p1-3ubuntu13.5","1:9.6p1-3ubuntu13.7","1:9.6p1-3ubuntu13.8","1:9.6p1-3ubuntu13.9","1:9.6p1-3ubuntu13.11","1:9.6p1-3ubuntu13.12","1:9.6p1-3ubuntu13.13","1:9.6p1-3ubuntu13.14","1:9.6p1-3ubuntu13.15","1:9.6p1-3ubuntu13.16","1:9.6p1-3ubuntu13.18","1:9.6p1-3ubuntu13.19"],"ecosystem_specific":{"binaries":[{"binary_name":"openssh-client","binary_version":"1:9.6p1-3ubuntu13.20"},{"binary_name":"openssh-server","binary_version":"1:9.6p1-3ubuntu13.20"},{"binary_version":"1:9.6p1-3ubuntu13.20","binary_name":"openssh-sftp-server"},{"binary_version":"1:9.6p1-3ubuntu13.20","binary_name":"openssh-tests"},{"binary_name":"ssh","binary_version":"1:9.6p1-3ubuntu13.20"},{"binary_version":"1:9.6p1-3ubuntu13.20","binary_name":"ssh-askpass-gnome"}],"availability":"No subscription required"},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:24.04:LTS","cves":[{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106552"},{"id":"CVE-2026-106553","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106555"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106582"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106583"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106584"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106585"},{"id":"CVE-2026-106586","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-106587","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"score":"medium","type":"Ubuntu"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8928-1.json"}},{"package":{"name":"openssh","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/openssh?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:10.2p1-2ubuntu3.8"}]}],"versions":["1:10.0p1-5ubuntu5","1:10.2p1-2ubuntu1","1:10.2p1-2ubuntu3","1:10.2p1-2ubuntu3.2","1:10.2p1-2ubuntu3.4","1:10.2p1-2ubuntu3.5","1:10.2p1-2ubuntu3.6","1:10.2p1-2ubuntu3.7"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"1:10.2p1-2ubuntu3.8","binary_name":"openssh-client"},{"binary_version":"1:10.2p1-2ubuntu3.8","binary_name":"openssh-client-gssapi"},{"binary_version":"1:10.2p1-2ubuntu3.8","binary_name":"openssh-server"},{"binary_name":"openssh-server-gssapi","binary_version":"1:10.2p1-2ubuntu3.8"},{"binary_version":"1:10.2p1-2ubuntu3.8","binary_name":"openssh-sftp-server"},{"binary_name":"openssh-tests","binary_version":"1:10.2p1-2ubuntu3.8"},{"binary_name":"ssh","binary_version":"1:10.2p1-2ubuntu3.8"},{"binary_version":"1:10.2p1-2ubuntu3.8","binary_name":"ssh-askpass-gnome"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8928-1.json","cves_map":{"ecosystem":"Ubuntu:26.04:LTS","cves":[{"id":"CVE-2026-106552","severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106553"},{"id":"CVE-2026-106555","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:U/C:L/I:N/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106582"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-106583"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106584"},{"id":"CVE-2026-106585","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-106586"},{"id":"CVE-2026-106587","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N"},{"score":"medium","type":"Ubuntu"}]}]}}}],"schema_version":"1.9.0"}