{"id":"CVE-2026-98863","published":"2026-10-18T16:17:40.780","lastModified":"2026-10-19T10:19:50.380","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails\n\nRe-pend GET_NESTED_STATE_PAGES before exiting to userspace if getting the\nnested pages fails in the KVM_RUN path.  If userspace re-runs the vCPU, and\nvmcs02 holds valid PFNs from the *previous* run of L2, then KVM could\nre-enter L2 with stale, unpinned PFNs mapped into e.g. the vAPIC page.\n\nNote, both SVM and VMX (as of commit 11722439fb20 (\"KVM: nVMX: Ensure\nKVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit\") ensure the request\nis cleared on VM-Exit (including the \"forced\" case), i.e. there is no risk\nof double-mapping due to emulated VMLAUNCH/VMRESUME/VMRUN *and* the request\ntrying to map the nested pages.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/10180a277549339020b08000206092c07e0bff5a","tags":[]},{"url":"https://git.kernel.org/stable/c/525694a6021ec6c8f7ce1f38acdf2dd77698fec1","tags":[]},{"url":"https://git.kernel.org/stable/c/942192dbcd3a06695ef6b31cf10a41a21cf014d8","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}