CVE-2026-64280
fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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 >> 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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 25, 2026 |
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Affected Versions
Linux / Linux
fa8dda1edef9ebc3af467c644c5533ac97171e12 < 59070040fd12e0b78d7b4d341d9f9a183237c5ff fa8dda1edef9ebc3af467c644c5533ac97171e12 < fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231 fa8dda1edef9ebc3af467c644c5533ac97171e12 < fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27
Linux / Linux
4.19