Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before 5352d488ce4ae5e8c68c080ad4c3a5f084ad5fbc; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before d7e787eee2ea619b6dbb98890472ee73daf2e7fd; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before a6a3884ff500f04f3088d6d09eec803cd35331a2; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before 16381bda90b261a656ded0568630c1b857b2ebc8; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before b50e6cd2395cde615f59b624819998d28c0668d6; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before 59070040fd12e0b78d7b4d341d9f9a183237c5ff; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231; affected fa8dda1edef9ebc3af467c644c5533ac97171e12 before fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 |
| Linux / Linux | affected 4.19; unaffected 0 before 4.19; unaffected 5.10.266 through 5.10.*; unaffected 5.15.217 through 5.15.*; unaffected 6.1.184 through 6.1.*; unaffected 6.6.148 through 6.6.*; unaffected 6.12.101 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5352d488ce4ae5e8c68c080ad4c3a5f084ad5fbc
- https://git.kernel.org/stable/c/d7e787eee2ea619b6dbb98890472ee73daf2e7fd
- https://git.kernel.org/stable/c/a6a3884ff500f04f3088d6d09eec803cd35331a2
- https://git.kernel.org/stable/c/16381bda90b261a656ded0568630c1b857b2ebc8
- https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6
- https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff
- https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231
- https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27