{"schemaVersion":3,"id":"USN-8090-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"openssh vulnerabilities\n\nJeremy Brown discovered that the OpenSSH GSSAPI Key Exchange incorrectly\nhandled disconnecting clients. In non-default configurations where the\nGSSAPIKeyExchange setting is enabled, a remote attacker could use this\nissue to cause OpenSSH to crash, resulting in a denial of service, or\npossibly execute arbitrary code. (CVE-2026-3497)\n\nDavid Leadbeater discovered that OpenSSH incorrectly handled certain\ncontrol characters in usernames. When untrusted usernames and the\nProxyCommand are being used, an attacker could possibly use this issue to\nexecute arbitrary code. (CVE-2025-61984)\n\nDavid Leadbeater discovered that OpenSSH incorrectly handled NULL\ncharacters in ssh:// URIs. When the ProxyCommand is being used, an attacker\ncould possibly use this issue to execute arbitrary code. (CVE-2025-61985)","dates":{"published":"2026-03-12T18:16:18.000Z","modified":"2026-06-30T18:15:17.640Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"openssh","name":"openssh","label":"openssh","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/openssh","purlType":"deb","versions":[{"text":"< 1:8.9p1-3ubuntu0.14","noFixRecorded":false,"fixedIn":null},{"text":"< 1:9.6p1-3ubuntu13.15","noFixRecorded":false,"fixedIn":null},{"text":"< 1:10.0p1-5ubuntu5.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:8.9p1-3ubuntu0.14 | < 1:9.6p1-3ubuntu13.15 | < 1:10.0p1-5ubuntu5.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8090-1","label":"ubuntu.com/security/notices/USN-8090-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2025-61984","label":"ubuntu.com/security/CVE-2025-61984","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2025-61985","label":"ubuntu.com/security/CVE-2025-61985","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-3497","label":"ubuntu.com/security/CVE-2026-3497","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2025-61984","CVE-2025-61985","CVE-2026-3497"]},"timeline":[{"kind":"published","date":"2026-03-12T18:16:18.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-30T18:15:17.640Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T19:10:35.873Z","stale":false,"partial":false}}