CVE-2026-64280fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Aug 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from fa8dda1edef9ebc3af467c644c5533ac97171e12 before 5352d488ce4ae5e8c68c080ad4c3a5f084ad5fbc; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before d7e787eee2ea619b6dbb98890472ee73daf2e7fd; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before a6a3884ff500f04f3088d6d09eec803cd35331a2; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before 16381bda90b261a656ded0568630c1b857b2ebc8; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before b50e6cd2395cde615f59b624819998d28c0668d6; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before 59070040fd12e0b78d7b4d341d9f9a183237c5ff; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231; from fa8dda1edef9ebc3af467c644c5533ac97171e12 before fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 | CNA record |
linux linux_kernel linux:linux_kernel | from 4.19 before 6.6.148; from 6.7 before 6.12.101; from 6.13 before 6.18.39; from 6.19 before 7.1.4 | NVD |
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/16381bda90b261a656ded0568630c1b857b2ebc8patch
- https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6patch
- https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ffpatch
- https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231patch
- https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.