{"id":"USN-8392-1","summary":"linux-aws-5.4, linux-hwe-5.4 vulnerabilities","details":"\nIt was discovered that the Linux kernel algif_aead module did not properly\nhandle in-place cryptographic operations. This flaw is known as Copy Fail.\nA local attacker could use this to escalate privileges, or possibly escape\na container. (CVE-2026-31431)\n\nIt 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\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  - Cryptographic API;\n  - Packet sockets;\n  - RDS protocol;\n  - TLS protocol;\n(CVE-2026-31504, CVE-2026-31533, CVE-2026-43033, CVE-2026-43077,\nCVE-2026-43078, CVE-2026-43494, CVE-2026-46028)\n\n","modified":"2026-06-05T03:18:21.025538633Z","published":"2026-06-04T21:28:50Z","related":["UBUNTU-CVE-2026-31431","UBUNTU-CVE-2026-31504","UBUNTU-CVE-2026-31533","UBUNTU-CVE-2026-43033","UBUNTU-CVE-2026-43077","UBUNTU-CVE-2026-43078","UBUNTU-CVE-2026-43284","UBUNTU-CVE-2026-43494","UBUNTU-CVE-2026-43500","UBUNTU-CVE-2026-46028"],"upstream":["CVE-2026-31431","CVE-2026-31504","CVE-2026-31533","CVE-2026-43033","CVE-2026-43077","CVE-2026-43078","CVE-2026-43284","CVE-2026-43494","CVE-2026-43500","CVE-2026-46028","UBUNTU-CVE-2026-31431","UBUNTU-CVE-2026-31504","UBUNTU-CVE-2026-31533","UBUNTU-CVE-2026-43033","UBUNTU-CVE-2026-43077","UBUNTU-CVE-2026-43078","UBUNTU-CVE-2026-43284","UBUNTU-CVE-2026-43494","UBUNTU-CVE-2026-43500","UBUNTU-CVE-2026-46028"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8392-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31431"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31504"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31533"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43033"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43077"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43078"},{"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-2026-46028"}],"affected":[{"package":{"name":"linux-aws-5.4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/linux-aws-5.4?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-1160.170~18.04.1"}]}],"versions":["5.4.0-1018.18~18.04.1","5.4.0-1020.20~18.04.2","5.4.0-1022.22~18.04.1","5.4.0-1024.24~18.04.1","5.4.0-1025.25~18.04.1","5.4.0-1028.29~18.04.1","5.4.0-1029.30~18.04.1","5.4.0-1030.31~18.04.1","5.4.0-1032.33~18.04.1","5.4.0-1034.35~18.04.1","5.4.0-1035.37~18.04.1","5.4.0-1037.39~18.04.1","5.4.0-1038.40~18.04.1","5.4.0-1039.41~18.04.1","5.4.0-1041.43~18.04.1","5.4.0-1043.45~18.04.1","5.4.0-1045.47~18.04.1","5.4.0-1047.49~18.04.1","5.4.0-1048.50~18.04.1","5.4.0-1049.51~18.04.1","5.4.0-1051.53~18.04.1","5.4.0-1054.57~18.04.1","5.4.0-1055.58~18.04.1","5.4.0-1056.59~18.04.1","5.4.0-1057.60~18.04.1","5.4.0-1058.61~18.04.3","5.4.0-1059.62~18.04.1","5.4.0-1060.63~18.04.1","5.4.0-1061.64~18.04.1","5.4.0-1063.66~18.04.1","5.4.0-1064.67~18.04.1","5.4.0-1065.68~18.04.1","5.4.0-1066.69~18.04.1","5.4.0-1068.72~18.04.1","5.4.0-1069.73~18.04.1","5.4.0-1071.76~18.04.1","5.4.0-1072.77~18.04.1","5.4.0-1075.80~18.04.1","5.4.0-1078.84~18.04.1","5.4.0-1080.87~18.04.1","5.4.0-1081.88~18.04.1","5.4.0-1083.90~18.04.1","5.4.0-1084.91~18.04.1","5.4.0-1085.92~18.04.1","5.4.0-1086.93~18.04.1","5.4.0-1088.96~18.04.1","5.4.0-1089.97~18.04.1","5.4.0-1090.98~18.04.1","5.4.0-1092.100~18.04.2","5.4.0-1093.102~18.04.2","5.4.0-1094.102~18.04.1","5.4.0-1096.104~18.04.1","5.4.0-1097.105~18.04.1","5.4.0-1099.107~18.04.1","5.4.0-1100.108~18.04.1","5.4.0-1101.109~18.04.1","5.4.0-1103.111~18.04.1","5.4.0-1104.112~18.04.1","5.4.0-1105.113~18.04.1","5.4.0-1106.114~18.04.1","5.4.0-1107.115~18.04.1","5.4.0-1108.116~18.04.1","5.4.0-1109.118~18.04.1","5.4.0-1110.119~18.04.1","5.4.0-1111.120~18.04.1","5.4.0-1112.121~18.04.2","5.4.0-1113.123~18.04.1","5.4.0-1114.124~18.04.1","5.4.0-1116.126~18.04.1","5.4.0-1117.127~18.04.1","5.4.0-1118.128~18.04.1","5.4.0-1119.129~18.04.1","5.4.0-1120.130~18.04.1","5.4.0-1121.131~18.04.1","5.4.0-1122.132~18.04.1","5.4.0-1123.133~18.04.1","5.4.0-1124.134~18.04.1","5.4.0-1125.135~18.04.1","5.4.0-1126.136~18.04.1","5.4.0-1127.137~18.04.2","5.4.0-1128.138~18.04.1","5.4.0-1129.139~18.04.1","5.4.0-1130.140~18.04.1","5.4.0-1131.141~18.04.1","5.4.0-1132.142~18.04.1","5.4.0-1133.143~18.04.1","5.4.0-1134.144~18.04.1","5.4.0-1135.145~18.04.1","5.4.0-1136.146~18.04.1","5.4.0-1137.147~18.04.1","5.4.0-1139.149~18.04.1","5.4.0-1142.152~18.04.1","5.4.0-1144.154~18.04.1","5.4.0-1145.155~18.04.1","5.4.0-1146.156~18.04.1","5.4.0-1147.157~18.04.1","5.4.0-1148.158~18.04.1","5.4.0-1149.159~18.04.1","5.4.0-1150.160~18.04.1","5.4.0-1151.161~18.04.1","5.4.0-1152.162~18.04.1","5.4.0-1153.163~18.04.1","5.4.0-1154.164~18.04.1","5.4.0-1156.166~18.04.1","5.4.0-1157.167~18.04.1","5.4.0-1158.168~18.04.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"linux-aws-5.4-cloud-tools-5.4.0-1160","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-aws-5.4-headers-5.4.0-1160","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-aws-5.4-tools-5.4.0-1160","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-buildinfo-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-cloud-tools-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-headers-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-image-unsigned-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-modules-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-modules-extra-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"},{"binary_name":"linux-tools-5.4.0-1160-aws","binary_version":"5.4.0-1160.170~18.04.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:18.04:LTS","cves":[{"id":"CVE-2026-31431","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":"Ubuntu","score":"high"}]},{"id":"CVE-2026-31504","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":"Ubuntu","score":"medium"}]},{"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":"medium"}],"id":"CVE-2026-31533"},{"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":"Ubuntu","score":"medium"}],"id":"CVE-2026-43033"},{"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-2026-43077"},{"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":"Ubuntu","score":"medium"}],"id":"CVE-2026-43078"},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/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"}],"id":"CVE-2026-43284"},{"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":"Ubuntu","score":"medium"}],"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":"Ubuntu","score":"high"}],"id":"CVE-2026-43500"},{"id":"CVE-2026-46028","severity":[{"type":"Ubuntu","score":"medium"}]}]},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8392-1.json"}},{"package":{"name":"linux-hwe-5.4","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/linux-hwe-5.4?arch=source&distro=esm-infra%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.0-231.251~18.04.1"}]}],"versions":["5.4.0-37.41~18.04.1","5.4.0-39.43~18.04.1","5.4.0-40.44~18.04.1","5.4.0-42.46~18.04.1","5.4.0-45.49~18.04.2","5.4.0-47.51~18.04.1","5.4.0-48.52~18.04.1","5.4.0-51.56~18.04.1","5.4.0-52.57~18.04.1","5.4.0-53.59~18.04.1","5.4.0-54.60~18.04.1","5.4.0-56.62~18.04.1","5.4.0-58.64~18.04.1","5.4.0-59.65~18.04.1","5.4.0-60.67~18.04.1","5.4.0-62.70~18.04.1","5.4.0-64.72~18.04.1","5.4.0-65.73~18.04.1","5.4.0-66.74~18.04.2","5.4.0-67.75~18.04.1","5.4.0-70.78~18.04.1","5.4.0-71.79~18.04.1","5.4.0-72.80~18.04.1","5.4.0-73.82~18.04.1","5.4.0-74.83~18.04.1","5.4.0-77.86~18.04.1","5.4.0-80.90~18.04.1","5.4.0-81.91~18.04.1","5.4.0-84.94~18.04.1","5.4.0-86.97~18.04.1","5.4.0-87.98~18.04.1","5.4.0-89.100~18.04.1","5.4.0-90.101~18.04.1","5.4.0-91.102~18.04.1","5.4.0-92.103~18.04.2","5.4.0-94.106~18.04.1","5.4.0-96.109~18.04.1","5.4.0-97.110~18.04.1","5.4.0-99.112~18.04.1","5.4.0-100.113~18.04.1","5.4.0-104.118~18.04.1","5.4.0-105.119~18.04.1","5.4.0-107.121~18.04.1","5.4.0-109.123~18.04.1","5.4.0-110.124~18.04.1","5.4.0-113.127~18.04.1","5.4.0-117.132~18.04.1","5.4.0-120.136~18.04.1","5.4.0-121.137~18.04.1","5.4.0-122.138~18.04.1","5.4.0-124.140~18.04.1","5.4.0-125.141~18.04.1","5.4.0-126.142~18.04.1","5.4.0-128.144~18.04.1","5.4.0-131.147~18.04.1","5.4.0-132.148~18.04.1","5.4.0-133.149~18.04.1","5.4.0-135.152~18.04.2","5.4.0-136.153~18.04.1","5.4.0-137.154~18.04.1","5.4.0-139.156~18.04.1","5.4.0-144.161~18.04.1","5.4.0-146.163~18.04.1","5.4.0-147.164~18.04.1","5.4.0-148.165~18.04.1","5.4.0-149.166~18.04.1","5.4.0-150.167~18.04.1","5.4.0-152.169~18.04.1","5.4.0-153.170~18.04.1","5.4.0-155.172~18.04.1","5.4.0-156.173~18.04.1","5.4.0-159.176~18.04.1","5.4.0-162.179~18.04.1","5.4.0-163.180~18.04.1","5.4.0-164.181~18.04.1","5.4.0-165.182~18.04.1","5.4.0-166.183~18.04.2","5.4.0-167.184~18.04.1","5.4.0-169.187~18.04.1","5.4.0-170.188~18.04.1","5.4.0-171.189~18.04.1","5.4.0-172.190~18.04.1","5.4.0-173.191~18.04.1","5.4.0-174.193~18.04.1","5.4.0-175.195~18.04.1","5.4.0-177.197~18.04.1","5.4.0-181.201~18.04.1","5.4.0-182.202~18.04.1","5.4.0-186.206~18.04.1","5.4.0-187.207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