{"id":"USN-7935-1","summary":"linux-azure, linux-azure-6.8 vulnerabilities","details":"Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered\nthat the Linux kernel contained insufficient branch predictor isolation\nbetween a guest and a userspace hypervisor for certain processors. This\nflaw is known as VMSCAPE. An attacker in a guest VM could possibly use this\nto expose sensitive information from the host OS. (CVE-2025-40300)\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  - HSI subsystem;\n  - Media drivers;\n  - Network drivers;\n  - Bluetooth subsystem;\n  - Timer subsystem;\n  - Memory management;\n  - Appletalk network protocol;\n  - Netfilter;\n  - TLS protocol;\n(CVE-2025-21729, CVE-2025-37838, CVE-2025-37958, CVE-2025-38118,\nCVE-2025-38227, CVE-2025-38352, CVE-2025-38616, CVE-2025-38666,\nCVE-2025-38678, CVE-2025-39964, CVE-2025-39993, CVE-2025-40018)\n","modified":"2026-04-27T18:32:43.066929Z","published":"2025-12-15T23:35:24Z","related":["UBUNTU-CVE-2025-21729","UBUNTU-CVE-2025-37838","UBUNTU-CVE-2025-37958","UBUNTU-CVE-2025-38118","UBUNTU-CVE-2025-38227","UBUNTU-CVE-2025-38352","UBUNTU-CVE-2025-38616","UBUNTU-CVE-2025-38666","UBUNTU-CVE-2025-38678","UBUNTU-CVE-2025-39964","UBUNTU-CVE-2025-39993","UBUNTU-CVE-2025-40018","UBUNTU-CVE-2025-40300"],"upstream":["CVE-2025-21729","CVE-2025-37838","CVE-2025-37958","CVE-2025-38118","CVE-2025-38227","CVE-2025-38352","CVE-2025-38616","CVE-2025-38666","CVE-2025-38678","CVE-2025-39964","CVE-2025-39993","CVE-2025-40018","CVE-2025-40300","UBUNTU-CVE-2025-21729","UBUNTU-CVE-2025-37838","UBUNTU-CVE-2025-37958","UBUNTU-CVE-2025-38118","UBUNTU-CVE-2025-38227","UBUNTU-CVE-2025-38352","UBUNTU-CVE-2025-38616","UBUNTU-CVE-2025-38666","UBUNTU-CVE-2025-38678","UBUNTU-CVE-2025-39964","UBUNTU-CVE-2025-39993","UBUNTU-CVE-2025-40018","UBUNTU-CVE-2025-40300"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7935-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-21729"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-37838"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-37958"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38118"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38227"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38352"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38616"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38666"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38678"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-39964"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-39993"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-40018"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-40300"}],"affected":[{"package":{"name":"linux-azure-6.8","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/linux-azure-6.8@6.8.0-1044.50~22.04.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1044.50~22.04.1"}]}],"versions":["6.8.0-1008.8~22.04.1","6.8.0-1009.9~22.04.1","6.8.0-1010.10~22.04.1","6.8.0-1012.14~22.04.1","6.8.0-1013.15~22.04.1","6.8.0-1014.16~22.04.1","6.8.0-1015.17~22.04.2","6.8.0-1017.20~22.04.1","6.8.0-1018.21~22.04.1","6.8.0-1020.23~22.04.1","6.8.0-1021.25~22.04.1","6.8.0-1025.30~22.04.1","6.8.0-1026.31~22.04.1","6.8.0-1027.32~22.04.1","6.8.0-1028.33~22.04.1","6.8.0-1029.34~22.04.1","6.8.0-1030.35~22.04.1","6.8.0-1031.36~22.04.1","6.8.0-1034.39~22.04.1","6.8.0-1036.42~22.04.1","6.8.0-1040.46~22.04.1","6.8.0-1041.47~22.04.1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-azure-6.8-cloud-tools-6.8.0-1044"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-azure-6.8-headers-6.8.0-1044"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-azure-6.8-tools-6.8.0-1044"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-buildinfo-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-cloud-tools-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-headers-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-image-unsigned-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-modules-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-modules-extra-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-modules-involflt-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-modules-iwlwifi-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50~22.04.1","binary_name":"linux-tools-6.8.0-1044-azure"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7935-1.json","cves_map":{"cves":[{"id":"CVE-2025-21729","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-2025-37838","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-2025-37958","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-38118","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":"high","type":"Ubuntu"}]},{"id":"CVE-2025-38227","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-2025-38352","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]},{"id":"CVE-2025-38616","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-38666","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":"high","type":"Ubuntu"}]},{"id":"CVE-2025-38678","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-39964","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-39993","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-40018","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-40300","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:22.04:LTS"}}},{"package":{"name":"linux-azure","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/linux-azure@6.8.0-1044.50?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1044.50"}]}],"versions":["6.5.0-1007.7","6.6.0-1001.1","6.8.0-1001.1","6.8.0-1005.5","6.8.0-1006.6","6.8.0-1007.7","6.8.0-1008.8","6.8.0-1009.9","6.8.0-1010.10","6.8.0-1012.14","6.8.0-1013.15","6.8.0-1014.16","6.8.0-1015.17","6.8.0-1016.18","6.8.0-1017.20","6.8.0-1018.21","6.8.0-1020.23","6.8.0-1021.25","6.8.0-1025.30","6.8.0-1026.31","6.8.0-1027.32","6.8.0-1028.33","6.8.0-1029.34","6.8.0-1030.35","6.8.0-1031.36","6.8.0-1034.39","6.8.0-1038.44","6.8.0-1040.46","6.8.0-1041.47","6.8.0-1042.48"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_version":"6.8.0-1044.50","binary_name":"linux-azure-cloud-tools-6.8.0-1044"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-azure-headers-6.8.0-1044"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-azure-tools-6.8.0-1044"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-buildinfo-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-cloud-tools-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-headers-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-image-unsigned-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-modules-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-modules-extra-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-modules-involflt-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-modules-iwlwifi-6.8.0-1044-azure"},{"binary_version":"6.8.0-1044.50","binary_name":"linux-tools-6.8.0-1044-azure"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7935-1.json","cves_map":{"cves":[{"id":"CVE-2025-21729","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-2025-37838","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-2025-37958","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-38118","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":"high","type":"Ubuntu"}]},{"id":"CVE-2025-38227","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-2025-38352","severity":[{"score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]},{"id":"CVE-2025-38616","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-38666","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":"high","type":"Ubuntu"}]},{"id":"CVE-2025-38678","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-39964","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-39993","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-40018","severity":[{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2025-40300","severity":[{"score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"high","type":"Ubuntu"}]}],"ecosystem":"Ubuntu:24.04:LTS"}}}],"schema_version":"1.7.5"}