{
  "cveId": "CVE-2026-98433",
  "url": "https://patchblox.com/security/cve/CVE-2026-98433",
  "summary": "CVE-2026-98433 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-98433, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  KVM: PPC: Book3S HV: fix secure device page leak on uv_page_in() failure  In kvmppc_svm_page_in(), if uv_page_in() fails after kvmppc_uvmem_get_page() has succeeded, the secure device page is never released.  kvmppc_uvmem_get_page() sets a bit in kvmppc_uvmem_bitmap, allocates a kvmppc_uvmem_page_pvt struct, marks the GFN as KVMPPC_GFN_UVMEM_PFN, and calls zone_device_page_init() which sets refcount=1 and locks the page.  The subsequent goto out_finalize skips the *mig.dst assignment, so migrate_vma_finalize() is a no-op for the page, and none of those resources are ever reclaimed.  Each occurrence permanently consumes one entry from the firmware-bounded secure memory pool (kvmppc_uvmem_bitmap), leaks pvt, and leaves the GFN marked as secure \u2014 making it unusable for the lifetime of the VM.  The twin __kvmppc_svm_page_out() already handles the analogous uv_page_out() failure correctly with unlock_page(dpage); __free_page(dpage).  Apply the same pattern here: unlock_page() followed by put_page(), which chains through free_zone_device_folio() into kvmppc_uvmem_folio_free() to clear the bitmap bit, free pvt, and reset the GFN state.  Reachable whenever uv_page_in() returns an error (e.g. UV pool exhaustion) on any POWER9/10 \u002B Ultravisor/PEF system.",
  "published": "2026-10-18T15:16:53Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "epss": 0.00165,
  "epssPercentile": 0.05703,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98433",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.1.190-1",
      "fix": "DEBIAN-CVE-2026-98433",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98433",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 13.5 (trixie)",
      "fixedVersion": "6.12.113-1",
      "fix": "DEBIAN-CVE-2026-98433",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98433",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.8-1",
      "fix": "DEBIAN-CVE-2026-98433",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98433",
      "released": "2026-10-19T16:27:52Z"
    },
    {
      "platform": "linux",
      "product": "linux-6.12",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "6.12.113-1~deb12u1",
      "fix": "DEBIAN-CVE-2026-98433",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98433",
      "released": "2026-10-19T16:27:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}