CVE-2026-64280 | In the Linux kernel, the following vulnerability has been re…

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 >> 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.

Metadata

CVE ID: CVE-2026-64280
State: PUBLISHED
Assigner: Linux
Reserved: 2026-07-19 15:36 UTC
Published: 2026-07-25 08:49 UTC
Last updated: 2026-07-25 08:49 UTC
Vendor / Product: Linux / Linux
Sources: cve.org · NVD

Severity & Metrics

No CVSS data available.

Affected products (2)

Vendor	Product	Platform	Versions
Linux	Linux	—	fa8dda1edef9ebc3af467c644c5533ac97171e12 < 59070040fd12e0b78d7b4d341d9f9a183237c5ff, fa8dda1edef9ebc3af467c644c5533ac97171e12 < fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231, fa8dda1edef9ebc3af467c644c5533ac97171e12 < fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27
Linux	Linux	—	4.19, 0 < 4.19, 6.18.39 ≤ 6.18., 7.1.4 ≤ 7.1. …

References (3)