CVE-2026-64280
Gravedad CVSS v3.1:
ALTA
Tipo:
No Disponible / Otro tipo
Fecha de publicación:
25/07/2026
Última modificación:
03/08/2026
Descripción
*** Pendiente de traducción *** In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()<br />
<br />
afu_ioctl_dma_map() accepts a 64-bit length from userspace via<br />
DFL_FPGA_PORT_DMA_MAP ioctl without an upper bound check. The value<br />
is passed to afu_dma_pin_pages() where npages is derived as<br />
length >> PAGE_SHIFT and passed to pin_user_pages_fast() which takes<br />
int nr_pages, causing implicit truncation if length is very large.<br />
<br />
Validate map.length at the ioctl entry point before calling<br />
afu_dma_map_region(), rejecting values whose page count exceeds<br />
INT_MAX.
Impacto
Puntuación base 3.x
8.80
Gravedad 3.x
ALTA
Referencias a soluciones, herramientas e información
- https://git.kernel.org/stable/c/16381bda90b261a656ded0568630c1b857b2ebc8
- https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff
- https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6
- https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231
- https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27