{"schemaVersion":3,"id":"USN-8390-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux, linux-azure, linux-azure-4.15, linux-azure-fips, linux-fips, linux-gcp-4.15, linux-gcp-fips, linux-kvm, linux-oracle vulnerability\n\nIt was discovered that the Linux kernel did not properly handle shared page\nfragments during socket buffer operations, collectively known as Dirty\nFrag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the\nRxRPC networking subsystem when processing paged fragments. A local\nattacker could use this to escalate privileges, or possibly escape a\ncontainer.","dates":{"published":"2026-06-04T21:13:52.000Z","modified":"2026-06-30T18:17:16.798Z","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":"< 4.15.0-251.263","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-251.263","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure","name":"linux-azure","label":"linux-azure","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure","purlType":"deb","versions":[{"text":"< 4.15.0-1202.217~14.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1202.217~14.04.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure-4.15","name":"linux-azure-4.15","label":"linux-azure-4.15","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure-4.15","purlType":"deb","versions":[{"text":"< 4.15.0-1202.217","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1202.217","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-azure-fips","name":"linux-azure-fips","label":"linux-azure-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-azure-fips","purlType":"deb","versions":[{"text":"< 4.15.0-2111.117","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-2111.117","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-fips","name":"linux-fips","label":"linux-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-fips","purlType":"deb","versions":[{"text":"< 4.15.0-1148.160","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1148.160","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-4.15","name":"linux-gcp-4.15","label":"linux-gcp-4.15","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-4.15","purlType":"deb","versions":[{"text":"< 4.15.0-1186.203","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1186.203","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-gcp-fips","name":"linux-gcp-fips","label":"linux-gcp-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-gcp-fips","purlType":"deb","versions":[{"text":"< 4.15.0-2094.100","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-2094.100","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-kvm","name":"linux-kvm","label":"linux-kvm","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-kvm","purlType":"deb","versions":[{"text":"< 4.15.0-1175.180","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1175.180","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-oracle","name":"linux-oracle","label":"linux-oracle","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-oracle","purlType":"deb","versions":[{"text":"< 4.15.0-1155.166","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1155.166","eol":null,"hubHref":null}],"affectedCount":9,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8390-1","label":"ubuntu.com/security/notices/USN-8390-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-43284","label":"ubuntu.com/security/CVE-2026-43284","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-43284"]},"timeline":[{"kind":"published","date":"2026-06-04T21:13:52.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-06-30T18:17:16.798Z","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":"2026-10-20T03:42:59.494Z","stale":false,"partial":false}}