CVE-2026-64280
- Source
- https://cve.org/CVERecord?id=CVE-2026-64280
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64280.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-64280
- Downstream
- Published
- 2026-07-25T08:49:23.753Z
- Modified
- 2026-07-28T04:02:14.917931349Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
- Summary
- fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
fpga: dfl-afu: validate DMA mapping length in afudmamap_region()
afuioctldmamap() accepts a 64-bit length from userspace via DFLFPGAPORTDMAMAP ioctl without an upper bound check. The value is passed to afudmapinpages() where npages is derived as length >> PAGESHIFT and passed to pinuserpagesfast() which takes int nr_pages, causing implicit truncation if length is very large.
Validate map.length at the ioctl entry point before calling afudmamapregion(), rejecting values whose page count exceeds INTMAX.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64280.json" }- References
-
- https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff
- https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231
- https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64280.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-64280
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git