{"id":"CVE-2022-42327","aliases":["ALPINE-CVE-2022-42327","DEBIAN-CVE-2022-42327","EUVD-2022-45402","GHSA-rgfj-62rr-5vf5","SUSE-SU-2022:4007-1","UBUNTU-CVE-2022-42327"],"status":"published","title":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC...","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. 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Advisory","advisory","report"]},{"url":"http://xenbits.xen.org/xsa/advisory-412.html","tags":["x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"http://www.openwall.com/lists/oss-security/2022/11/01/3","tags":["mailing-list","x_transferred","Mailing List","Patch","Third Party 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unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T00:00:00Z","modified":"2025-05-05T19:11:37.065Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:34:27.640972Z"}],"euvd":[{"id":"EUVD-2022-45402","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T00:00:00Z","modified":"2025-05-05T19:11:37Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T20:32:55.242615Z"}],"ghsa":[{"id":"GHSA-rgfj-62rr-5vf5","title":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC...","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T19:00:30Z","modified":"2025-05-05T21:32:22Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:02:07.964163Z"}],"nvd":[{"id":"CVE-2022-42327","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T13:15:12.163Z","modified":"2026-06-17T05:04:44.01Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:07:31.127985Z"}],"osv":[{"id":"ALPINE-CVE-2022-42327","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T13:15:12.163Z","modified":"2026-11-03T07:18:33.749007711Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T07:50:38.973973Z"},{"id":"CVE-2022-42327","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T13:15:12.163Z","modified":"2026-03-14T11:56:48.62803Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:44:27.186787Z"},{"id":"DEBIAN-CVE-2022-42327","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T13:15:12.163Z","modified":"2026-11-03T08:03:40.675601482Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T08:24:24.826312Z"},{"id":"UBUNTU-CVE-2022-42327","description":"x86: unintended memory sharing between guests On Intel systems that support the \"virtualize APIC accesses\" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.","status":"published","published":"2022-11-01T13:15:00Z","modified":"2026-10-17T12:56:22.768824973Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T16:53:55.502114Z"},{"id":"SUSE-SU-2022:4007-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\n- CVE-2022-33746: Fixed DoS due to excessively long P2M pool freeing (bsc#1203806).\n- CVE-2022-33748: Fixed DoS due to race in locking (bsc#1203807).\n- CVE-2022-42311, CVE-2022-42312, CVE-2022-42313, CVE-2022-42314, CVE-2022-42315, CVE-2022-42316, CVE-2022-42317, CVE-2022-42318: xen: Xenstore: Guests can let xenstored run out of memory (bsc#1204482)\n- CVE-2022-42309: xen: Xenstore: Guests can crash xenstored (bsc#1204485)\n- CVE-2022-42310: xen: Xenstore: Guests can create orphaned Xenstore nodes (bsc#1204487)\n- CVE-2022-42319: xen: Xenstore: Guests can cause Xenstore to not free temporary memory (bsc#1204488)\n- CVE-2022-42320: xen: Xenstore: Guests can get access to Xenstore nodes of deleted domains (bsc#1204489)\n- CVE-2022-42321: xen: Xenstore: Guests can crash xenstored via exhausting the stack (bsc#1204490)\n- CVE-2022-42322,CVE-2022-42323: xen: Xenstore: cooperating guests can create arbitrary numbers of nodes (bsc#1204494)\n- CVE-2022-42325,CVE-2022-42326: xen: Xenstore: Guests can create arbitrary number of nodes via transactions (bsc#1204496)\n- xen: Frontends vulnerable to backends (bsc#1193923).\n","status":"published","published":"2022-11-16T08:12:49Z","modified":"2026-02-04T03:06:54.14244Z","updated_at":"2026-11-02T15:53:51.440565Z"}]}}