{"id":"USN-8616-1","summary":"linux-ibm, linux-ibm-5.4 vulnerabilities","details":"It 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. (CVE-2026-43284, CVE-2026-43500)\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  - InfiniBand drivers;\n  - STMicroelectronics network drivers;\n  - NVME drivers;\n  - SCSI subsystem;\n  - USB over IP driver;\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  - Ethernet bridge;\n  - Ceph Core library;\n  - IPv4 networking;\n  - IPv6 networking;\n  - Netfilter;\n  - RDS protocol;\n  - RxRPC session sockets;\n  - X.25 network layer;\n(CVE-2026-23272, CVE-2026-23455, CVE-2026-31402, CVE-2026-31418,\nCVE-2026-31607, CVE-2026-31637, CVE-2026-31649, CVE-2026-31659,\nCVE-2026-31682, CVE-2026-31685, CVE-2026-43011, CVE-2026-43037,\nCVE-2026-43038, CVE-2026-43117, CVE-2026-43383, CVE-2026-43407,\nCVE-2026-43414, CVE-2026-43494, CVE-2026-45988, CVE-2026-46043,\nCVE-2026-46119, CVE-2026-46135, CVE-2026-46243)\n","modified":"2026-07-28T11:05:48.624907920Z","published":"2026-07-28T06:43:49Z","related":["UBUNTU-CVE-2026-23272","UBUNTU-CVE-2026-23455","UBUNTU-CVE-2026-31402","UBUNTU-CVE-2026-31418","UBUNTU-CVE-2026-31607","UBUNTU-CVE-2026-31637","UBUNTU-CVE-2026-31649","UBUNTU-CVE-2026-31659","UBUNTU-CVE-2026-31682","UBUNTU-CVE-2026-31685","UBUNTU-CVE-2026-43011","UBUNTU-CVE-2026-43037","UBUNTU-CVE-2026-43038","UBUNTU-CVE-2026-43117","UBUNTU-CVE-2026-43284","UBUNTU-CVE-2026-43383","UBUNTU-CVE-2026-43407","UBUNTU-CVE-2026-43414","UBUNTU-CVE-2026-43494","UBUNTU-CVE-2026-43500","UBUNTU-CVE-2026-43503","UBUNTU-CVE-2026-45988","UBUNTU-CVE-2026-46043","UBUNTU-CVE-2026-46119","UBUNTU-CVE-2026-46135","UBUNTU-CVE-2026-46243"],"upstream":["CVE-2026-23272","CVE-2026-23455","CVE-2026-31402","CVE-2026-31418","CVE-2026-31607","CVE-2026-31637","CVE-2026-31649","CVE-2026-31659","CVE-2026-31682","CVE-2026-31685","CVE-2026-43011","CVE-2026-43037","CVE-2026-43038","CVE-2026-43117","CVE-2026-43284","CVE-2026-43383","CVE-2026-43407","CVE-2026-43414","CVE-2026-43494","CVE-2026-43500","CVE-2026-43503","CVE-2026-45988","CVE-2026-46043","CVE-2026-46119","CVE-2026-46135","CVE-2026-46243","UBUNTU-CVE-2026-23272","UBUNTU-CVE-2026-23455","UBUNTU-CVE-2026-31402","UBUNTU-CVE-2026-31418","UBUNTU-CVE-2026-31607","UBUNTU-CVE-2026-31637","UBUNTU-CVE-2026-31649","UBUNTU-CVE-2026-31659","UBUNTU-CVE-2026-31682","UBUNTU-CVE-2026-31685","UBUNTU-CVE-2026-43011","UBUNTU-CVE-2026-43037","UBUNTU-CVE-2026-43038","UBUNTU-CVE-2026-43117","UBUNTU-CVE-2026-43284","UBUNTU-CVE-2026-43383","UBUNTU-CVE-2026-43407","UBUNTU-CVE-2026-43414","UBUNTU-CVE-2026-43494","UBUNTU-CVE-2026-43500","UBUNTU-CVE-2026-43503","UBUNTU-CVE-2026-45988","UBUNTU-CVE-2026-46043","UBUNTU-CVE-2026-46119","UBUNTU-CVE-2026-46135","UBUNTU-CVE-2026-46243"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8616-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23272"},{"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-2026-31418"},{"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-2026-31649"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31659"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31682"},{"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-2026-43117"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43284"},{"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-2026-43494"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43500"},{"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-2026-46043"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46119"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46135"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46243"}],"affected":[{"package":{"name":"linux-ibm-5.4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/linux-ibm-5.4?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1107.112~18.04.1"}]}],"versions":["5.4.0-1010.11~18.04.2","5.4.0-1012.13~18.04.1","5.4.0-1014.15~18.04.1","5.4.0-1015.16~18.04.1","5.4.0-1017.19~18.04.1","5.4.0-1018.20~18.04.1","5.4.0-1019.21~18.04.1","5.4.0-1020.22~18.04.1","5.4.0-1021.23~18.04.1","5.4.0-1023.25~18.04.1","5.4.0-1026.29~18.04.1","5.4.0-1028.32~18.04.1","5.4.0-1029.33~18.04.1","5.4.0-1031.35~18.04.1","5.4.0-1032.36~18.04.1","5.4.0-1033.37~18.04.1","5.4.0-1034.38~18.04.1","5.4.0-1036.41~18.04.1","5.4.0-1037.42~18.04.1","5.4.0-1040.45~18.04.2","5.4.0-1041.46~18.04.1","5.4.0-1042.47~18.04.1","5.4.0-1044.49~18.04.1","5.4.0-1045.50~18.04.1","5.4.0-1046.51~18.04.1","5.4.0-1047.52~18.04.1","5.4.0-1048.53~18.04.1","5.4.0-1049.54~18.04.1","5.4.0-1050.55~18.04.1","5.4.0-1051.56~18.04.1","5.4.0-1052.57~18.04.1","5.4.0-1053.58~18.04.1","5.4.0-1054.59~18.04.1","5.4.0-1056.61~18.04.1","5.4.0-1057.62~18.04.1","5.4.0-1058.63~18.04.1","5.4.0-1059.64~18.04.1","5.4.0-1060.65~18.04.1","5.4.0-1061.66~18.04.1","5.4.0-1063.68~18.04.1","5.4.0-1064.69~18.04.1","5.4.0-1065.70~18.04.1","5.4.0-1066.71~18.04.1","5.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with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8616-1.json","cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-23272"},{"id":"CVE-2026-23455","severity":[{"type":"CVSS_V4","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_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"}]},{"id":"CVE-2026-31402","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:L/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"}]},{"id":"CVE-2026-31418","severity":[{"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-2026-31607","severity":[{"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_V4"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/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","type":"CVSS_V3"},{"type":"Ubuntu","score":"high"}]},{"severity":[{"type":"CVSS_V4","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"},{"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-2026-31637"},{"severity":[{"score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/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"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-31649"},{"id":"CVE-2026-31659","severity":[{"type":"CVSS_V4","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_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"}]},{"severity":[{"score":"CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/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:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-31682"},{"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-2026-31685"},{"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"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"critical"}]},{"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"},{"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"},{"id":"CVE-2026-43038","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"},{"type":"Ubuntu","score":"critical"}]},{"id":"CVE-2026-43117","severity":[{"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","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":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-43284","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/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"},{"type":"Ubuntu","score":"high"}]},{"severity":[{"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","type":"CVSS_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:H/A:H"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-43383"},{"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"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"high"}]},{"id":"CVE-2026-43414","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"low"}]},{"severity":[{"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_V4"},{"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:U/C:H/I:H/A:H"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2026-43494"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"score":"CVSS:3.1/AV:L/AC:L/PR: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