{"schema":"threatline.record/2","record":{"id":"CVE-2026-98863","aliases":[],"summary":"KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails","details":"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.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98863","source_modified_at":"2026-10-19T09:26:57.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"671ddc700fd08b94967b1e2a937020e30c838609","lessThan":"525694a6021ec6c8f7ce1f38acdf2dd77698fec1","status":"affected","versionType":"git"},{"version":"671ddc700fd08b94967b1e2a937020e30c838609","lessThan":"942192dbcd3a06695ef6b31cf10a41a21cf014d8","status":"affected","versionType":"git"},{"version":"671ddc700fd08b94967b1e2a937020e30c838609","lessThan":"10180a277549339020b08000206092c07e0bff5a","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98863","source_modified_at":"2026-10-19T09:26:57.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"5.4","status":"affected"},{"version":"0","lessThan":"5.4","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98863","source_modified_at":"2026-10-19T09:26:57.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"525694a6021ec6c8f7ce1f38acdf2dd77698fec1","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98863","source_modified_at":"2026-10-19T09:26:57.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"942192dbcd3a06695ef6b31cf10a41a21cf014d8","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98863","source_modified_at":"2026-10-19T09:26:57.709Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"10180a277549339020b08000206092c07e0bff5a","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00154,"percentile":0.04236,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:51:24.446Z","modified_at":"2026-10-19T09:26:57.709Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98863","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:26:57.709Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98863","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/525694a6021ec6c8f7ce1f38acdf2dd77698fec1"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/942192dbcd3a06695ef6b31cf10a41a21cf014d8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/10180a277549339020b08000206092c07e0bff5a"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:26:57.709Z","content_hash":"466c47294e9d59e5eb10459e7ea43e71173700c64407da3747a4b3e34ac18446"}}