{"id":"USN-8388-2","summary":"linux-intel-iotg-5.15, linux-lowlatency, linux-lowlatency-hwe-5.15 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,\nCVE-2026-46300)\n\nQualys discovered that a race condition existed in the ptrace subsystem of\nthe Linux kernel when privileged processes are exiting. An unprivileged\nlocal attacker could use this issue to expose sensitive information.\n(CVE-2026-46333)\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  - RDS protocol;\n(CVE-2026-43494)\n","modified":"2026-06-23T04:59:16.224861906Z","published":"2026-06-22T23:01:08Z","related":["UBUNTU-CVE-2026-43284","UBUNTU-CVE-2026-43494","UBUNTU-CVE-2026-43500","UBUNTU-CVE-2026-43503","UBUNTU-CVE-2026-46300","UBUNTU-CVE-2026-46333"],"upstream":["CVE-2026-43284","CVE-2026-43494","CVE-2026-43500","CVE-2026-43503","CVE-2026-46300","CVE-2026-46333","UBUNTU-CVE-2026-43284","UBUNTU-CVE-2026-43494","UBUNTU-CVE-2026-43500","UBUNTU-CVE-2026-43503","UBUNTU-CVE-2026-46300","UBUNTU-CVE-2026-46333"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8388-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43284"},{"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-2026-46300"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46333"}],"affected":[{"package":{"name":"linux-intel-iotg-5.15","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/linux-intel-iotg-5.15?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1104.110~20.04.1"}]}],"versions":["5.15.0-1003.5~20.04.1","5.15.0-1008.11~20.04.1","5.15.0-1010.14~20.04.1","5.15.0-1015.20~20.04.2","5.15.0-1016.21~20.04.1","5.15.0-1017.22~20.04.1","5.15.0-1018.23~20.04.1","5.15.0-1021.26~20.04.1","5.15.0-1023.28~20.04.1","5.15.0-1025.30~20.04.1","5.15.0-1026.31~20.04.1","5.15.0-1027.32~20.04.1","5.15.0-1030.35~20.04.1","5.15.0-1031.36~20.04.1","5.15.0-1033.38~20.04.1","5.15.0-1034.39~20.04.1","5.15.0-1036.41~20.04.1","5.15.0-1037.42~20.04.1","5.15.0-1038.43~20.04.1","5.15.0-1040.46~20.04.1","5.15.0-1043.49~20.04.1","5.15.0-1045.51~20.04.1","5.15.0-1046.52~20.04.1","5.15.0-1048.54~20.04.1","5.15.0-1049.55~20.04.1","5.15.0-1050.56~20.04.1","5.15.0-1051.57~20.04.1","5.15.0-1052.58~20.04.1","5.15.0-1055.61~20.04.1","5.15.0-1058.64~20.04.1","5.15.0-1059.65~20.04.1","5.15.0-1060.66~20.04.1","5.15.0-1061.67~20.04.1","5.15.0-1062.68~20.04.1","5.15.0-1063.69~20.04.1","5.15.0-1064.70~20.04.1","5.15.0-1065.71~20.04.1","5.15.0-1066.72~20.04.1","5.15.0-1067.73~20.04.1","5.15.0-1071.77~20.04.1","5.15.0-1072.78~20.04.1","5.15.0-1073.79~20.04.2","5.15.0-1074.80~20.04.1","5.15.0-1077.83~20.04.1","5.15.0-1078.84~20.04.1","5.15.0-1079.85~20.04.1","5.15.0-1083.89~20.04.1","5.15.0-1084.90~20.04.1","5.15.0-1085.91~20.04.1","5.15.0-1086.92~20.04.1","5.15.0-1087.93~20.04.1","5.15.0-1088.94~20.04.1","5.15.0-1090.96~20.04.1","5.15.0-1091.97~20.04.1","5.15.0-1092.98~20.04.1","5.15.0-1093.99~20.04.1","5.15.0-1094.100~20.04.1","5.15.0-1095.101~20.04.1","5.15.0-1096.102~20.04.1","5.15.0-1098.104~20.04.1","5.15.0-1099.105~20.04.1","5.15.0-1100.106~20.04.1","5.15.0-1101.107~20.04.1","5.15.0-1103.109~20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-buildinfo-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-cloud-tools-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-headers-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-image-unsigned-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-intel-iotg-5.15-cloud-tools-5.15.0-1104"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-intel-iotg-5.15-cloud-tools-common"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-intel-iotg-5.15-headers-5.15.0-1104"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-intel-iotg-5.15-tools-5.15.0-1104"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-intel-iotg-5.15-tools-common"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-intel-iotg-5.15-tools-host"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-modules-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-modules-extra-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-modules-iwlwifi-5.15.0-1104-intel-iotg"},{"binary_version":"5.15.0-1104.110~20.04.1","binary_name":"linux-tools-5.15.0-1104-intel-iotg"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"cves_map":{"cves":[{"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:C/C:H/I:H/A:H"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-43284"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"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"},{"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:U/C:H/I:H/A:H"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-43500"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-43503"},{"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:L/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-46300"},{"severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"high"}],"id":"CVE-2026-46333"}],"ecosystem":"Ubuntu:Pro:20.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8388-2.json"}},{"package":{"name":"linux-lowlatency-hwe-5.15","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/linux-lowlatency-hwe-5.15?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-181.191~20.04.1"}]}],"versions":["5.15.0-33.34~20.04.1","5.15.0-42.45~20.04.1","5.15.0-43.46~20.04.1","5.15.0-46.49~20.04.1","5.15.0-48.54~20.04.1","5.15.0-50.56~20.04.1","5.15.0-52.58~20.04.1","5.15.0-53.59~20.04.1","5.15.0-56.62~20.04.1","5.15.0-58.64~20.04.1","5.15.0-60.66~20.04.1","5.15.0-67.74~20.04.1","5.15.0-69.76~20.04.1","5.15.0-70.77~20.04.1","5.15.0-71.78~20.04.1","5.15.0-72.79~20.04.1","5.15.0-73.80~20.04.1","5.15.0-75.82~20.04.1","5.15.0-76.83~20.04.1","5.15.0-78.85~20.04.1","5.15.0-79.88~20.04.1","5.15.0-82.91~20.04.1","5.15.0-83.92~20.04.1","5.15.0-84.93~20.04.1","5.15.0-86.95~20.04.1","5.15.0-87.96~20.04.1","5.15.0-88.98~20.04.1","5.15.0-89.99~20.04.1","5.15.0-91.101~20.04.1","5.15.0-92.102~20.04.1","5.15.0-94.104~20.04.1","5.15.0-97.107~20.04.1","5.15.0-100.110~20.04.1","5.15.0-101.111~20.04.1","5.15.0-102.112~20.04.1","5.15.0-105.115~20.04.1","5.15.0-106.116~20.04.1","5.15.0-107.117~20.04.1","5.15.0-110.120~20.04.1","5.15.0-113.123~20.04.1","5.15.0-116.126~20.04.1","5.15.0-117.127~20.04.1","5.15.0-118.128~20.04.1","5.15.0-119.129~20.04.1","5.15.0-121.131~20.04.1","5.15.0-122.132~20.04.1","5.15.0-124.134~20.04.1","5.15.0-125.135~20.04.1","5.15.0-126.136~20.04.1","5.15.0-127.137~20.04.1","5.15.0-128.138~20.04.1","5.15.0-129.139~20.04.1","5.15.0-131.141~20.04.1","5.15.0-133.143~20.04.1","5.15.0-134.145~20.04.1","5.15.0-135.146~20.04.1","5.15.0-136.147~20.04.1","5.15.0-138.148~20.04.1","5.15.0-139.149~20.04.1","5.15.0-140.150~20.04.1","5.15.0-142.152~20.04.1","5.15.0-143.153~20.04.1","5.15.0-144.157~20.04.1","5.15.0-145.158~20.04.1","5.15.0-152.162~20.04.1","5.15.0-153.163~20.04.1","5.15.0-156.166~20.04.1","5.15.0-157.167~20.04.1","5.15.0-160.170~20.04.1","5.15.0-161.171~20.04.1","5.15.0-163.173~20.04.1","5.15.0-164.174~20.04.1","5.15.0-168.178~20.04.1","5.15.0-170.180~20.04.1","5.15.0-171.181~20.04.1","5.15.0-173.183~20.04.1","5.15.0-174.184~20.04.1","5.15.0-175.185~20.04.1","5.15.0-177.187~20.04.1","5.15.0-178.188~20.04.1","5.15.0-179.189~20.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-buildinfo-5.15.0-181-lowlatency"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-buildinfo-5.15.0-181-lowlatency-64k"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-cloud-tools-5.15.0-181-lowlatency"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-headers-5.15.0-181-lowlatency"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-headers-5.15.0-181-lowlatency-64k"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-image-unsigned-5.15.0-181-lowlatency"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-image-unsigned-5.15.0-181-lowlatency-64k"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-lowlatency-hwe-5.15-cloud-tools-5.15.0-181"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-lowlatency-hwe-5.15-headers-5.15.0-181"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-lowlatency-hwe-5.15-tools-5.15.0-181"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-modules-5.15.0-181-lowlatency"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"linux-modules-5.15.0-181-lowlatency-64k"},{"binary_version":"5.15.0-181.191~20.04.1","binary_name":"lin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with Ubuntu Pro (Infra-only): 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