{"schemaVersion":3,"id":"USN-8548-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"linux, linux-aws, linux-kvm vulnerabilities\n\nIt was discovered that a logic flaw existed in the XFRM ESP-in-TCP\nsubsystem in the Linux kernel when handling socket buffer fragments. This\nflaw is known as Fragnesia. A local attacker could use this to escalate\nprivileges, or possibly escape a container. (CVE-2026-43503)\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  - SCSI subsystem;\n  - Thermal drivers;\n  - USB over IP driver;\n  - File systems infrastructure;\n  - Ext4 file system;\n  - Network file system (NFS) server daemon;\n  - SMB network file system;\n  - Tracing infrastructure;\n  - B.A.T.M.A.N. meshing protocol;\n  - Ceph Core library;\n  - DCCP (Datagram Congestion Control Protocol);\n  - IPv4 networking;\n  - IPv6 networking;\n  - Netfilter;\n  - RxRPC session sockets;\n  - X.25 network layer;\n(CVE-2021-47117, CVE-2021-47202, CVE-2023-52646, CVE-2024-56643,\nCVE-2026-23455, CVE-2026-31402, CVE-2026-31607, CVE-2026-31637,\nCVE-2026-31659, CVE-2026-31685, CVE-2026-43011, CVE-2026-43037,\nCVE-2026-43038, CVE-2026-43383, CVE-2026-43407, CVE-2026-43414,\nCVE-2026-45988, CVE-2026-46119, CVE-2026-46243)","dates":{"published":"2026-08-13T21:12:03.000Z","modified":"2026-08-19T18:50:20.366Z","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":"< 4.4.0-283.317","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-283.317","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":"< 4.4.0-1194.209","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-1194.209","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":"< 4.4.0-1157.168","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 4.4.0-1157.168","eol":null,"hubHref":null}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-8548-2","label":"ubuntu.com/security/notices/USN-8548-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-47117","label":"ubuntu.com/security/CVE-2021-47117","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-47202","label":"ubuntu.com/security/CVE-2021-47202","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-52646","label":"ubuntu.com/security/CVE-2023-52646","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2024-56643","label":"ubuntu.com/security/CVE-2024-56643","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-23455","label":"ubuntu.com/security/CVE-2026-23455","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-31402","label":"ubuntu.com/security/CVE-2026-31402","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-31607","label":"ubuntu.com/security/CVE-2026-31607","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-31637","label":"ubuntu.com/security/CVE-2026-31637","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-31659","label":"ubuntu.com/security/CVE-2026-31659","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-31685","label":"ubuntu.com/security/CVE-2026-31685","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43011","label":"ubuntu.com/security/CVE-2026-43011","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43037","label":"ubuntu.com/security/CVE-2026-43037","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43038","label":"ubuntu.com/security/CVE-2026-43038","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43383","label":"ubuntu.com/security/CVE-2026-43383","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43407","label":"ubuntu.com/security/CVE-2026-43407","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43414","label":"ubuntu.com/security/CVE-2026-43414","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-43503","label":"ubuntu.com/security/CVE-2026-43503","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-45988","label":"ubuntu.com/security/CVE-2026-45988","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-46119","label":"ubuntu.com/security/CVE-2026-46119","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2026-46243","label":"ubuntu.com/security/CVE-2026-46243","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2021-47117","CVE-2021-47202","CVE-2023-52646","CVE-2024-56643","CVE-2026-23455","CVE-2026-31402","CVE-2026-31607","CVE-2026-31637","CVE-2026-31659","CVE-2026-31685","CVE-2026-43011","CVE-2026-43037","CVE-2026-43038","CVE-2026-43383","CVE-2026-43407","CVE-2026-43414","CVE-2026-43503","CVE-2026-45988","CVE-2026-46119","CVE-2026-46243"]},"timeline":[{"kind":"published","date":"2026-08-13T21:12:03.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-19T18:50:20.366Z","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":"2026-10-19T21:43:49.262Z","stale":false,"partial":false}}