{"id":"CVE-2026-64286","summary":"KVM: arm64: Clear __hyp_running_vcpu when flushing the pKVM hyp vCPU","details":"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 -\u003e EL2).\n\nFix by clearing __hyp_running_vcpu after the copy.","modified":"2026-07-28T04:02:41.286700225Z","published":"2026-07-25T08:49:27.542Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64286.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/477145860dba4c30f0b4e36f02f4c5291c1c888b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d4f4d61715d1061ba83b88196a3605662be30750"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dfaef40d8a1533940fc1af788d70fce07362b4ce"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e8042f6e1d7befb2fb6b10a75918642bcd0acf9a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64286.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64286"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"be66e67f175096f283c9d5614c4991fc9e7ed975"},{"fixed":"477145860dba4c30f0b4e36f02f4c5291c1c888b"},{"fixed":"dfaef40d8a1533940fc1af788d70fce07362b4ce"},{"fixed":"6bea2f8becdb20d34378493c3b77a9b9cf8c6cfa"},{"fixed":"d4f4d61715d1061ba83b88196a3605662be30750"},{"fixed":"e8042f6e1d7befb2fb6b10a75918642bcd0acf9a"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64286.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.145"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.39"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64286.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}]}