Answer in brief
CVE-2026-64280 records a High severity (CVSS 8.8) vulnerability in fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <16381bda90b261a656ded0568630c1b857b2ebc8 || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <b50e6cd2395cde615f59b624819998d28c0668d6 || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <59070040fd12e0b78d7b4d341d9f9a183237c5ff || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231 || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 | 16381bda90b261a656ded0568630c1b857b2ebc8, b50e6cd2395cde615f59b624819998d28c0668d6, 59070040fd12e0b78d7b4d341d9f9a183237c5ff, fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231, fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64280 records a High severity (CVSS 8.8) vulnerability in fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <16381bda90b261a656ded0568630c1b857b2ebc8 || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <b50e6cd2395cde615f59b624819998d28c0668d6 || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <59070040fd12e0b78d7b4d341d9f9a183237c5ff || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231 || >=fa8dda1edef9ebc3af467c644c5533ac97171e12 <fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 | 16381bda90b261a656ded0568630c1b857b2ebc8, b50e6cd2395cde615f59b624819998d28c0668d6, 59070040fd12e0b78d7b4d341d9f9a183237c5ff, fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231, fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 3, 2026
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.
Quoted source text, attributed separately from HOL analysis.