{
  "cveId": "CVE-2026-89804",
  "url": "https://patchblox.com/security/cve/CVE-2026-89804",
  "summary": "CVE-2026-89804 is fixed in linux on 1 platform by DEBIAN-CVE-2026-89804 (version 7.2.6-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "linux: In the Linux kernel, the following vulnerability has been resolved:  drm/nouveau/dmem: fix mismatched DMA unmap size...",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/nouveau/dmem: fix mismatched DMA unmap size for large folios  Device-private THP migration maps migration buffers with page_size() and records that length in dma_info-\u003Esize.  For a compound folio page_size() is PAGE_SIZE \u003C\u003C order, but two teardown sites still pass a literal PAGE_SIZE to dma_unmap_page():    - nouveau_dmem_migrate_to_ram() on the success path, and   - nouveau_dmem_migrate_copy_one() on the copy-error path.  For an order \u003E 0 folio this unmaps less than was mapped, leaking the remainder of the IOMMU/IOVA mapping.  The other unmap sites, in nouveau_dmem_migrate_chunk() and nouveau_dmem_evict_chunk(), already use the saved size; use it here too.",
  "published": "2026-09-16T11:16:45Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00165,
  "epssPercentile": 0.05764,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.6-1",
      "fix": "DEBIAN-CVE-2026-89804",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89804",
      "released": "2026-09-23T19:19:02Z"
    }
  ],
  "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"
  }
}