{"id":"USN-8548-1","summary":"linux-aws, linux-fips, linux-lts-xenial vulnerabilities","details":"It 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)\n","modified":"2026-07-15T19:59:25.594156711Z","published":"2026-07-15T12:07:51Z","related":["UBUNTU-CVE-2021-47117","UBUNTU-CVE-2021-47202","UBUNTU-CVE-2023-52646","UBUNTU-CVE-2024-56643","UBUNTU-CVE-2026-23455","UBUNTU-CVE-2026-31402","UBUNTU-CVE-2026-31607","UBUNTU-CVE-2026-31637","UBUNTU-CVE-2026-31659","UBUNTU-CVE-2026-31685","UBUNTU-CVE-2026-43011","UBUNTU-CVE-2026-43037","UBUNTU-CVE-2026-43038","UBUNTU-CVE-2026-43383","UBUNTU-CVE-2026-43407","UBUNTU-CVE-2026-43414","UBUNTU-CVE-2026-43503","UBUNTU-CVE-2026-45988","UBUNTU-CVE-2026-46119","UBUNTU-CVE-2026-46243"],"upstream":["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","UBUNTU-CVE-2021-47117","UBUNTU-CVE-2021-47202","UBUNTU-CVE-2023-52646","UBUNTU-CVE-2024-56643","UBUNTU-CVE-2026-23455","UBUNTU-CVE-2026-31402","UBUNTU-CVE-2026-31607","UBUNTU-CVE-2026-31637","UBUNTU-CVE-2026-31659","UBUNTU-CVE-2026-31685","UBUNTU-CVE-2026-43011","UBUNTU-CVE-2026-43037","UBUNTU-CVE-2026-43038","UBUNTU-CVE-2026-43383","UBUNTU-CVE-2026-43407","UBUNTU-CVE-2026-43414","UBUNTU-CVE-2026-43503","UBUNTU-CVE-2026-45988","UBUNTU-CVE-2026-46119","UBUNTU-CVE-2026-46243"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8548-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47117"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-47202"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-52646"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2024-56643"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23455"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31402"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31607"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31637"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31659"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31685"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43011"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43037"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43038"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43383"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43407"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43414"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43503"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-45988"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46119"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46243"}],"affected":[{"package":{"name":"linux-aws","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/linux-aws?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.4.0-1156.162"}]}],"versions":["4.4.0-1002.2","4.4.0-1003.3","4.4.0-1005.5","4.4.0-1006.6","4.4.0-1009.9","4.4.0-1010.10","4.4.0-1011.11","4.4.0-1012.12","4.4.0-1014.14","4.4.0-1016.16","4.4.0-1017.17","4.4.0-1019.19","4.4.0-1022.22","4.4.0-1023.23","4.4.0-1024.25","4.4.0-1025.26","4.4.0-1027.30","4.4.0-1028.31","4.4.0-1029.32","4.4.0-1031.34","4.4.0-1032.35","4.4.0-1034.37","4.4.0-1036.39","4.4.0-1037.40","4.4.0-1038.41","4.4.0-1039.42","4.4.0-1040.43","4.4.0-1042.45","4.4.0-1044.47","4.4.0-1045.48","4.4.0-1046.50","4.4.0-1048.52","4.4.0-1050.54","4.4.0-1052.56","4.4.0-1054.58","4.4.0-1055.59","4.4.0-1056.60","4.4.0-1058.62","4.4.0-1059.63","4.4.0-1060.64","4.4.0-1061.65","4.4.0-1062.66","4.4.0-1064.68","4.4.0-1065.69","4.4.0-1066.70","4.4.0-1067.71","4.4.0-1073.77","4.4.0-1074.78","4.4.0-1075.79","4.4.0-1076.80","4.4.0-1077.81","4.4.0-1078.82","4.4.0-1081.85","4.4.0-1082.86","4.4.0-1083.87","4.4.0-1085.89","4.4.0-1086.90","4.4.0-1087.91","4.4.0-1088.92","4.4.0-1090.94","4.4.0-1091.95","4.4.0-1092.96","4.4.0-1093.97","4.4.0-1094.99","4.4.0-1095.100","4.4.0-1096.101","4.4.0-1097.102","4.4.0-1098.103","4.4.0-1099.104","4.4.0-1101.106","4.4.0-1102.107","4.4.0-1103.108","4.4.0-1104.109","4.4.0-1107.113","4.4.0-1109.115","4.4.0-1110.116","4.4.0-1111.117","4.4.0-1112.118","4.4.0-1113.119","4.4.0-1114.120","4.4.0-1115.121","4.4.0-1116.122","4.4.0-1117.123","4.4.0-1118.124","4.4.0-1119.125","4.4.0-1120.126","4.4.0-1121.127","4.4.0-1122.128","4.4.0-1123.129","4.4.0-1124.130","4.4.0-1125.131","4.4.0-1127.133","4.4.0-1128.134","4.4.0-1129.135","4.4.0-1130.136","4.4.0-1131.137","4.4.0-1133.139","4.4.0-1134.140","4.4.0-1135.141","4.4.0-1136.142","4.4.0-1137.143","4.4.0-1138.144","4.4.0-1139.145","4.4.0-1140.146","4.4.0-1141.147","4.4.0-1142.148","4.4.0-1143.149","4.4.0-1144.150","4.4.0-1145.151","4.4.0-1146.152","4.4.0-1147.153","4.4.0-1148.154","4.4.0-1149.1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with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_version":"4.4.0-1156.162","binary_name":"linux-aws-cloud-tools-4.4.0-1156"},{"binary_name":"linux-aws-headers-4.4.0-1156","binary_version":"4.4.0-1156.162"},{"binary_name":"linux-aws-tools-4.4.0-1156","binary_version":"4.4.0-1156.162"},{"binary_version":"4.4.0-1156.162","binary_name":"linux-buildinfo-4.4.0-1156-aws"},{"binary_version":"4.4.0-1156.162","binary_name":"linux-cloud-tools-4.4.0-1156-aws"},{"binary_name":"linux-headers-4.4.0-1156-aws","binary_version":"4.4.0-1156.162"},{"binary_version":"4.4.0-1156.162","binary_name":"linux-image-4.4.0-1156-aws"},{"binary_name":"linux-modules-4.4.0-1156-aws","binary_version":"4.4.0-1156.162"},{"binary_version":"4.4.0-1156.162","binary_name":"linux-tools-4.4.0-1156-aws"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:14.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2021-47117"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2021-47202"},{"id":"CVE-2023-52646","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2024-56643","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-23455","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"score":"high","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"critical","type":"Ubuntu"}],"id":"CVE-2026-31402"},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2026-31607"},{"id":"CVE-2026-31637","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"critical","type":"Ubuntu"}]},{"id":"CVE-2026-31659","severity":[{"score":"CVSS:4.0/AV:A/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"high","type":"Ubuntu"}]},{"id":"CVE-2026-31685","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-43011","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"critical"}]},{"id":"CVE-2026-43037","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"critical","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"critical","type":"Ubuntu"}],"id":"CVE-2026-43038"},{"id":"CVE-2026-43383","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-43407","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"},{"type":"Ubuntu","score":"high"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"score":"low","type":"Ubuntu"}],"id":"CVE-2026-43414"},{"id":"CVE-2026-43503","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},{"score":"high","type":"Ubuntu"}]},{"id":"CVE-2026-45988","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","typ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