{"id":"USN-8661-1","summary":"linux-azure-5.15, linux-gcp, linux-gcp-fips, linux-hwe-5.15, linux-lowlatency-hwe-5.15 vulnerabilities","details":"Siebe Devroe, Héloïse Gollier, and Mathy Vanhoef discovered that the WiFi\nimplementation in the Linux kernel did not properly handle aggregated\nframes in mesh networks, due to an incorrect fix for CVE-2020-24588. A\nphysically proximate attacker could use this issue to inject packets.\n(CVE-2025-27558)\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  - x86 architecture;\n  - InfiniBand drivers;\n  - Network drivers;\n  - NVME drivers;\n  - Ext4 file system;\n  - SMB network file system;\n  - IPv4 networking;\n  - Network traffic control;\n  - TCP network protocol;\n  - Locking primitives;\n  - IPv6 networking;\n  - Multipath TCP;\n  - Netfilter;\n  - Open vSwitch;\n  - SCTP protocol;\n  - SMC sockets;\n(CVE-2026-31414, CVE-2026-31448, CVE-2026-31705, CVE-2026-43198,\nCVE-2026-43378, CVE-2026-43499, CVE-2026-46266, CVE-2026-46331,\nCVE-2026-52924, CVE-2026-52989, CVE-2026-53086, CVE-2026-53176,\nCVE-2026-53212, CVE-2026-53215, CVE-2026-53224, CVE-2026-53225,\nCVE-2026-53228, CVE-2026-53246, CVE-2026-53359, CVE-2026-64531)\n","modified":"2026-08-21T05:43:19.145861942Z","published":"2026-08-20T22:26:52Z","related":["UBUNTU-CVE-2025-27558","UBUNTU-CVE-2026-31414","UBUNTU-CVE-2026-31448","UBUNTU-CVE-2026-31705","UBUNTU-CVE-2026-43198","UBUNTU-CVE-2026-43378","UBUNTU-CVE-2026-43499","UBUNTU-CVE-2026-46266","UBUNTU-CVE-2026-46331","UBUNTU-CVE-2026-52924","UBUNTU-CVE-2026-52989","UBUNTU-CVE-2026-53086","UBUNTU-CVE-2026-53176","UBUNTU-CVE-2026-53212","UBUNTU-CVE-2026-53215","UBUNTU-CVE-2026-53224","UBUNTU-CVE-2026-53225","UBUNTU-CVE-2026-53228","UBUNTU-CVE-2026-53246","UBUNTU-CVE-2026-53359","UBUNTU-CVE-2026-64531"],"upstream":["CVE-2025-27558","CVE-2026-31414","CVE-2026-31448","CVE-2026-31705","CVE-2026-43198","CVE-2026-43378","CVE-2026-43499","CVE-2026-46266","CVE-2026-46331","CVE-2026-52924","CVE-2026-52989","CVE-2026-53086","CVE-2026-53176","CVE-2026-53212","CVE-2026-53215","CVE-2026-53224","CVE-2026-53225","CVE-2026-53228","CVE-2026-53246","CVE-2026-53359","CVE-2026-64531","UBUNTU-CVE-2025-27558","UBUNTU-CVE-2026-31414","UBUNTU-CVE-2026-31448","UBUNTU-CVE-2026-31705","UBUNTU-CVE-2026-43198","UBUNTU-CVE-2026-43378","UBUNTU-CVE-2026-43499","UBUNTU-CVE-2026-46266","UBUNTU-CVE-2026-46331","UBUNTU-CVE-2026-52924","UBUNTU-CVE-2026-52989","UBUNTU-CVE-2026-53086","UBUNTU-CVE-2026-53176","UBUNTU-CVE-2026-53212","UBUNTU-CVE-2026-53215","UBUNTU-CVE-2026-53224","UBUNTU-CVE-2026-53225","UBUNTU-CVE-2026-53228","UBUNTU-CVE-2026-53246","UBUNTU-CVE-2026-53359","UBUNTU-CVE-2026-64531"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8661-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-27558"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31414"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31448"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-31705"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43198"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43378"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-43499"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46266"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-46331"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-52924"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-52989"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53086"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53176"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53212"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53215"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53224"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53225"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53228"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53246"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53359"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-64531"}],"affected":[{"package":{"name":"linux-azure-5.15","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-5.15?arch=source&distro=esm-infra%2Ffocal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1119.128~20.04.1"}]}],"versions":["5.15.0-1007.8~20.04.1","5.15.0-1008.9~20.04.1","5.15.0-1013.16~20.04.1","5.15.0-1014.17~20.04.1","5.15.0-1017.20~20.04.1","5.15.0-1019.24~20.04.1","5.15.0-1020.25~20.04.1","5.15.0-1021.26~20.04.1","5.15.0-1022.27~20.04.1","5.15.0-1023.29~20.04.1","5.15.0-1029.36~20.04.1","5.15.0-1030.37~20.04.1","5.15.0-1031.38~20.04.1","5.15.0-1033.40~20.04.1","5.15.0-1034.41~20.04.1","5.15.0-1035.42~20.04.1","5.15.0-1036.43~20.04.1","5.15.0-1037.44~20.04.1","5.15.0-1038.45~20.04.1","5.15.0-1039.46~20.04.1","5.15.0-1040.47~20.04.1","5.15.0-1041.48~20.04.1","5.15.0-1042.49~20.04.1","5.15.0-1043.50~20.04.1","5.15.0-1045.52~20.04.1","5.15.0-1046.53~20.04.1","5.15.0-1047.54~20.04.1","5.15.0-1049.56~20.04.1","5.15.0-1050.57~20.04.1","5.15.0-1051.59~20.04.1","5.15.0-1052.60~20.04.1","5.15.0-1053.61~20.04.1","5.15.0-1054.62~20.04.1","5.15.0-1056.64~20.04.1","5.15.0-1057.65~20.04.1","5.15.0-1058.66~20.04.2","5.15.0-1059.67~20.04.1","5.15.0-1060.69~20.04.1","5.15.0-1061.70~20.04.1","5.15.0-1063.72~20.04.1","5.15.0-1064.73~20.04.1","5.15.0-1065.74~20.04.1","5.15.0-1067.76~20.04.1","5.15.0-1068.77~20.04.1","5.15.0-1070.79~20.04.1","5.15.0-1071.80~20.04.1","5.15.0-1072.81~20.04.1","5.15.0-1073.82~20.04.1","5.15.0-1074.83~20.04.1","5.15.0-1075.84~20.04.1","5.15.0-1078.87~20.04.1","5.15.0-1079.88~20.04.1","5.15.0-1081.90~20.04.1","5.15.0-1082.91~20.04.1","5.15.0-1086.95~20.04.1","5.15.0-1087.96~20.04.1","5.15.0-1088.97~20.04.1","5.15.0-1089.98~20.04.1","5.15.0-1091.100~20.04.1","5.15.0-1094.103~20.04.1","5.15.0-1095.104~20.04.1","5.15.0-1096.105~20.04.1","5.15.0-1097.106~20.04.1","5.15.0-1098.107~20.04.1","5.15.0-1102.111~20.04.1","5.15.0-1103.112~20.04.1","5.15.0-1110.119~20.04.1","5.15.0-1111.120~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with Ubuntu Pro (Infra-only): https://ubuntu.com/pro","binaries":[{"binary_name":"linux-azure-5.15-cloud-tools-5.15.0-1119","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_name":"linux-azure-5.15-headers-5.15.0-1119","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_name":"linux-azure-5.15-tools-5.15.0-1119","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_name":"linux-buildinfo-5.15.0-1119-azure","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_version":"5.15.0-1119.128~20.04.1","binary_name":"linux-cloud-tools-5.15.0-1119-azure"},{"binary_name":"linux-headers-5.15.0-1119-azure","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_name":"linux-image-unsigned-5.15.0-1119-azure","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_version":"5.15.0-1119.128~20.04.1","binary_name":"linux-modules-5.15.0-1119-azure"},{"binary_name":"linux-modules-extra-5.15.0-1119-azure","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_name":"linux-modules-involflt-5.15.0-1119-azure","binary_version":"5.15.0-1119.128~20.04.1"},{"binary_name":"linux-tools-5.15.0-1119-azure","binary_version":"5.15.0-1119.128~20.04.1"}]},"database_specific":{"cves_map":{"ecosystem":"Ubuntu:Pro:20.04:LTS","cves":[{"id":"CVE-2025-27558","severity":[{"score":"CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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:H/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-31414","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/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":"high"}]},{"severity":[{"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":"low"}],"id":"CVE-2026-31448"},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-31705"},{"id":"CVE-2026-43198","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:L/AC:H/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"},{"score":"high","type":"Ubuntu"}]},{"id":"CVE-2026-43378","severity":[{"score":"CVSS:4.0/AV:N/AC:H/AT:P/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: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":"high"}]},{"id":"CVE-2026-43499","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"},{"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"}]},{"severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/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:N/I:H/A:H","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-46266"},{"id":"CVE-2026-46331","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:L/PR:H/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-2026-52924","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:N/AC:H/PR:N/UI:N/S:U/C:L/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":"Ubuntu","score":"high"}]},{"severity":[{"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_V4"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/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"},{"score":"critical","type":"Ubuntu"}],"id":"CVE-2026-52989"},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:L/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":"high"}],"id":"CVE-2026-53086"},{"id":"CVE-2026-53176","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:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/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":"high","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:H/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:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-53212"},{"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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