{"id":"USN-7861-4","summary":"linux-aws-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  - HSI subsystem;\n  - Bluetooth subsystem;\n  - Timer subsystem;\n(CVE-2025-37838, CVE-2025-38118, CVE-2025-38352)\n","modified":"2026-04-27T17:50:34.132409Z","published":"2025-11-19T21:06:49Z","upstream":["CVE-2025-37838","CVE-2025-38118","CVE-2025-38352","CVE-2025-40300","UBUNTU-CVE-2025-37838","UBUNTU-CVE-2025-38118","UBUNTU-CVE-2025-38352","UBUNTU-CVE-2025-40300"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7861-4"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-37838"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38118"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-38352"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-40300"}],"affected":[{"package":{"name":"linux-aws-6.8","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/linux-aws-6.8@6.8.0-1042.44~22.04.1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.8.0-1042.44~22.04.1"}]}],"versions":["6.8.0-1009.9~22.04.2","6.8.0-1010.10~22.04.2","6.8.0-1011.12~22.04.1","6.8.0-1013.14~22.04.1","6.8.0-1014.15~22.04.1","6.8.0-1015.16~22.04.1","6.8.0-1016.17~22.04.2","6.8.0-1017.18~22.04.1","6.8.0-1018.19~22.04.1","6.8.0-1019.21~22.04.1","6.8.0-1020.22~22.04.1","6.8.0-1021.23~22.04.1","6.8.0-1023.25~22.04.1","6.8.0-1024.26~22.04.1","6.8.0-1027.29~22.04.1","6.8.0-1028.30~22.04.1","6.8.0-1029.31~22.04.1","6.8.0-1030.32~22.04.1","6.8.0-1031.33~22.04.1","6.8.0-1032.34~22.04.1","6.8.0-1033.35~22.04.1","6.8.0-1035.37~22.04.1","6.8.0-1036.38~22.04.1","6.8.0-1039.41~22.04.1","6.8.0-1040.42~22.04.1","6.8.0-1041.43~22.04.1"],"ecosystem_specific":{"binaries":[{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-aws-6.8-cloud-tools-6.8.0-1042"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-aws-6.8-headers-6.8.0-1042"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-aws-6.8-tools-6.8.0-1042"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-buildinfo-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-buildinfo-6.8.0-1042-aws-64k"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-cloud-tools-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-cloud-tools-6.8.0-1042-aws-64k"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-headers-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-headers-6.8.0-1042-aws-64k"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-image-unsigned-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-image-unsigned-6.8.0-1042-aws-64k"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-modules-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-modules-6.8.0-1042-aws-64k"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-modules-extra-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-modules-extra-6.8.0-1042-aws-64k"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-tools-6.8.0-1042-aws"},{"binary_version":"6.8.0-1042.44~22.04.1","binary_name":"linux-tools-6.8.0-1042-aws-64k"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7861-4.json","cves_map":{"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":"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":"high","type":"Ubuntu"}],"id":"CVE-2025-38118"},{"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-2025-38352"},{"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"}],"id":"CVE-2025-40300"}],"ecosystem":"Ubuntu:22.04:LTS"}}}],"schema_version":"1.7.5"}