{"schema_version":"1.7.5","id":"USN-7860-2","published":"2025-11-06T13:32:32Z","modified":"2026-06-03T13:35:23.623365165Z","related":["UBUNTU-CVE-2025-40300"],"upstream":["CVE-2025-40300","UBUNTU-CVE-2025-40300"],"summary":"linux-realtime-6.14 vulnerability","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.\n","affected":[{"package":{"name":"linux-realtime-6.14","ecosystem":"Ubuntu:Pro:Realtime:24.04:LTS","purl":"pkg:deb/ubuntu/linux-realtime-6.14?arch=source&distro=realtime%2Fnoble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.14.0-1015.15~24.04.1"}]}],"versions":["6.14.0-1003.3~24.04.3","6.14.0-1010.10~24.04.1","6.14.0-1011.11~24.04.1","6.14.0-1012.12~24.04.1","6.14.0-1013.13~24.04.1","6.14.0-1014.14~24.04.1"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro: https://ubuntu.com/pro","binaries":[{"binary_name":"linux-buildinfo-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-cloud-tools-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-headers-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-image-unsigned-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-modules-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-modules-extra-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-modules-iwlwifi-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-realtime-6.14-cloud-tools-6.14.0-1015","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-realtime-6.14-headers-6.14.0-1015","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-realtime-6.14-tools-6.14.0-1015","binary_version":"6.14.0-1015.15~24.04.1"},{"binary_name":"linux-tools-6.14.0-1015-realtime","binary_version":"6.14.0-1015.15~24.04.1"}]},"database_specific":{"cves_map":{"cves":[{"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:Pro:Realtime:24.04:LTS"},"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-7860-2.json"}}],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7860-2"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-40300"}]}