{"schemaVersion":3,"id":"USN-2643-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux regression\n\nThe Fix for CVE-2015-1328 introduced a regression into the Linux kernel's\noverlayfs file system. The removal of a directory that only exists on the\nlower layer results in a kernel panic.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n Philip Pettersson discovered a privilege escalation when using overlayfs\n mounts inside of user namespaces. A local user could exploit this flaw to\n gain administrative privileges on the system.","dates":{"published":"2015-06-21T18:47:11.000Z","modified":"2026-04-22T09:13:43.669Z","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":"linux","name":"linux","label":"linux","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux","purlType":"deb","versions":[{"text":"< 3.13.0-55.94","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.13.0-55.94","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-2643-2","label":"ubuntu.com/security/notices/USN-2643-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"http://bugs.launchpad.net/bugs/1465998","label":"bugs.launchpad.net/bugs/1465998","hostname":"bugs.launchpad.net","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2015-06-21T18:47:11.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T09:13:43.669Z","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":"2026-10-19T19:27:51.232Z","stale":false,"partial":false}}