{"id":"USN-8255-2","summary":"linux-azure-5.15 vulnerabilities","details":"Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS\nimplementation in the Ubuntu Linux kernel did not properly perform\npermission checks in certain situations. A local attacker could possibly\nuse this to gain elevated privileges. (CVE-2023-2640)\n\nShir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in\nthe Ubuntu Linux kernel did not properly perform permission checks in\ncertain situations. A local attacker could possibly use this to gain\nelevated privileges. (CVE-2023-32629)\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  - Network drivers;\n  - NVME drivers;\n(CVE-2026-23112, CVE-2026-23273)\n","modified":"2026-05-12T16:44:26.750856726Z","published":"2026-05-11T14:02:26Z","related":["UBUNTU-CVE-2023-2640","UBUNTU-CVE-2023-32629","UBUNTU-CVE-2026-23112","UBUNTU-CVE-2026-23273"],"upstream":["CVE-2023-2640","CVE-2023-32629","CVE-2026-23112","CVE-2026-23273","UBUNTU-CVE-2023-2640","UBUNTU-CVE-2023-32629","UBUNTU-CVE-2026-23112","UBUNTU-CVE-2026-23273"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8255-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-2640"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2023-32629"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23112"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-23273"}],"affected":[{"package":{"name":"linux-azure-5.15","ecosystem":"Ubuntu:Pro:20.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-5.15@5.15.0-1111.120~20.04.1?arch=source&distro=esm-infra/focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.15.0-1111.120~20.04.1"}]}],"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"],"ecosystem_specific":{"binaries":[{"binary_name":"linux-azure-5.15-cloud-tools-5.15.0-1111","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-azure-5.15-headers-5.15.0-1111","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-azure-5.15-tools-5.15.0-1111","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-buildinfo-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-cloud-tools-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-headers-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-image-unsigned-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-modules-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-modules-extra-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-modules-involflt-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"},{"binary_name":"linux-tools-5.15.0-1111-azure","binary_version":"5.15.0-1111.120~20.04.1"}],"availability":"Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8255-2.json","cves_map":{"ecosystem":"Ubuntu:Pro:20.04: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"},{"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-2023-2640"},{"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":"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-2023-32629"},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/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","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}],"id":"CVE-2026-23112"},{"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-2026-23273"}]}}}],"schema_version":"1.7.5"}