{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "671ddc700fd08b94967b1e2a937020e30c838609"
            },
            {
              "fixed": "525694a6021ec6c8f7ce1f38acdf2dd77698fec1"
            },
            {
              "fixed": "942192dbcd3a06695ef6b31cf10a41a21cf014d8"
            },
            {
              "fixed": "10180a277549339020b08000206092c07e0bff5a"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.4.0"
            },
            {
              "fixed": "6.18.56"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98863.json"
  },
  "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.",
  "id": "CVE-2026-98863",
  "modified": "2026-10-19T02:31:03.291708430Z",
  "published": "2026-10-18T15:51:24.446Z",
  "references": [
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/10180a277549339020b08000206092c07e0bff5a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/525694a6021ec6c8f7ce1f38acdf2dd77698fec1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/942192dbcd3a06695ef6b31cf10a41a21cf014d8"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98863.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98863"
    }
  ],
  "schema_version": "1.9.0",
  "summary": "KVM: x86: Re-pend GET_NESTED_STATE_PAGES if getting said pages fails"
}