{"id":"CVE-2026-64562","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-64562","summary":"KVM: nVMX: Hide shadow VMCS right after VMCLEAR","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nVMX: Hide shadow VMCS right after VMCLEAR\n\nfree_nested() frees the shadow VMCS while vmcs01 still points to it. But\nbecause it is asynchronous with respect to loaded_vmcs_clear(), the vCPU\nmight migrate before the pointer is cleared and __loaded_vmcs_clear()\nmay then execute VMCLEAR.\n\nThe VMCS needs to stay attached until its explicit VMCLEAR completes, but\nthen it can be hidden and the page safely freed.","published":"2026-08-04T06:23:21.855Z","modified":"2026-08-09T03:47:26.545247913Z","cvss":{"score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.6.148"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1dabef6e206568bf9d9ade74f6e56a48ea35695d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/589419470030a89f16cf19300658b6dc644ca946"},{"type":"WEB","url":"https://git.kernel.org/stable/c/622ebfac01ba4f9c0060cebd41257fe46fc4a0b3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8001d2ce9d9bd09118ce523aef595aa094573ae3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af56298e9d86e6098cd1d2e155cb2949b7c45412"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64562.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64562"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-09T03:47:26.545247913Z"}}