{"id":"CVE-2026-64286","revision":"0b49fe3c573a488ab0fedc2675e27cd5","records":[{"revision":"0b49fe3c573a488ab0fedc2675e27cd5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64286","aliases":[],"title":"KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU\n\nflush_hyp_vcpu() copies the host vCPU context into the hyp's private\nvCPU on every run. ctxt_to_vcpu() expects a guest context to have a\nNULL __hyp_running_vcpu, which is only ever set on the host context, so\nthat it resolves the vCPU via container_of(). While this is generally\nthe case, flush_hyp_vcpu() copies the context verbatim and does not\nenforce this, so a value provided by the host is dereferenced at EL2\n(host -> EL2).\n\nFix by clearing __hyp_running_vcpu after the copy.","state":0,"publishedAt":"2026-07-25T08:49:27.542+00:00","modifiedAt":"2026-10-19T20:38:21.93+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/kvm/hyp/nvhe/hyp-main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"477145860dba4c30f0b4e36f02f4c5291c1c888b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"dfaef40d8a1533940fc1af788d70fce07362b4ce\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"d4f4d61715d1061ba83b88196a3605662be30750\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"e8042f6e1d7befb2fb6b10a75918642bcd0acf9a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/kvm/hyp/nvhe/hyp-main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.39\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.4\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","score":8.2,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888b","https://git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4ce","https://git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa","https://git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750","https://git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64286","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64286","identifiers":["CVE-2026-64286"]},"retained":false,"historicalAffected":[]}],"coverage":[]}