{"schemaVersion":3,"id":"USN-8644-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux, linux-aws, linux-aws-fips, linux-aws-hwe, linux-fips, linux-hwe, linux-kvm vulnerabilities\n\nSeveral security issues were discovered in the Linux kernel.\nAn attacker could possibly use these to compromise the system.\nThis update corrects flaws in the following subsystems:\n  - File systems infrastructure;\n  - OCFS2 file system;\n  - B.A.T.M.A.N. meshing protocol;\n  - SCTP protocol;\n  - TIPC protocol;\n(CVE-2026-43071, CVE-2026-52914, CVE-2026-52993, CVE-2026-53043,\nCVE-2026-53224, CVE-2026-53246, CVE-2026-53309)","dates":{"published":"2026-08-18T18:20:23.000Z","modified":"2026-08-19T18:50:20.387Z","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":"< 4.15.0-257.269","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-257.269","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-aws","name":"linux-aws","label":"linux-aws","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws","purlType":"deb","versions":[{"text":"< 4.15.0-1196.209","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1196.209","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-aws-fips","name":"linux-aws-fips","label":"linux-aws-fips","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws-fips","purlType":"deb","versions":[{"text":"< 4.15.0-2134.140","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-2134.140","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-aws-hwe","name":"linux-aws-hwe","label":"linux-aws-hwe","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-aws-hwe","purlType":"deb","versions":[{"text":"< 4.15.0-1196.209~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1196.209~16.04.1","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":"< 4.15.0-1151.163","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1151.163","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"linux-hwe","name":"linux-hwe","label":"linux-hwe","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/linux-hwe","purlType":"deb","versions":[{"text":"< 4.15.0-257.269~16.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-257.269~16.04.1","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":"< 4.15.0-1178.183","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.15.0-1178.183","eol":null,"hubHref":null}],"affectedCount":7,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8644-1","label":"ubuntu.com/security/notices/USN-8644-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-43071","label":"ubuntu.com/security/CVE-2026-43071","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-52914","label":"ubuntu.com/security/CVE-2026-52914","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-52993","label":"ubuntu.com/security/CVE-2026-52993","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-53043","label":"ubuntu.com/security/CVE-2026-53043","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-53224","label":"ubuntu.com/security/CVE-2026-53224","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-53246","label":"ubuntu.com/security/CVE-2026-53246","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-53309","label":"ubuntu.com/security/CVE-2026-53309","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2026-43071","CVE-2026-52914","CVE-2026-52993","CVE-2026-53043","CVE-2026-53224","CVE-2026-53246","CVE-2026-53309"]},"timeline":[{"kind":"published","date":"2026-08-18T18:20:23.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-19T18:50:20.387Z","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":"2026-10-21T01:08:32.579Z","stale":false,"partial":false}}