{
  "cveId": "CVE-2026-64280",
  "url": "https://patchblox.com/security/cve/CVE-2026-64280",
  "summary": "CVE-2026-64280 is fixed in 17 products on 1 platform, first by DEBIAN-CVE-2026-64280, released August 7, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()  afu_ioctl_dma_map() accepts a 64-bit length from userspace via DFL_FPGA_PORT_DMA_MAP ioctl without an upper bound check. The value is passed to afu_dma_pin_pages() where npages is derived as length \u003E\u003E PAGE_SHIFT and passed to pin_user_pages_fast() which takes int nr_pages, causing implicit truncation if length is very large.  Validate map.length at the ioctl entry point before calling afu_dma_map_region(), rejecting values whose page count exceeds INT_MAX.",
  "published": "2026-07-25T10:17:08Z",
  "severity": "Important",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
  "epss": 0.00169,
  "epssPercentile": 0.06252,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64280",
  "fixes": [
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  "attribution": {
    "text": "Data: Patchblox Patch Radar",
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    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
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}