{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64280", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.777Z", "datePublished": "2026-07-25T08:49:23.753Z", "dateUpdated": "2026-07-25T08:49:23.753Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:49:23.753Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()\n\nafu_ioctl_dma_map() accepts a 64-bit length from userspace via\nDFL_FPGA_PORT_DMA_MAP ioctl without an upper bound check. The value\nis passed to afu_dma_pin_pages() where npages is derived as\nlength >> PAGE_SHIFT and passed to pin_user_pages_fast() which takes\nint nr_pages, causing implicit truncation if length is very large.\n\nValidate map.length at the ioctl entry point before calling\nafu_dma_map_region(), rejecting values whose page count exceeds\nINT_MAX."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/fpga/dfl-afu-main.c"], "versions": [{"version": "fa8dda1edef9ebc3af467c644c5533ac97171e12", "lessThan": "59070040fd12e0b78d7b4d341d9f9a183237c5ff", "status": "affected", "versionType": "git"}, {"version": "fa8dda1edef9ebc3af467c644c5533ac97171e12", "lessThan": "fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231", "status": "affected", "versionType": "git"}, {"version": "fa8dda1edef9ebc3af467c644c5533ac97171e12", "lessThan": "fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/fpga/dfl-afu-main.c"], "versions": [{"version": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff"}, {"url": "https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231"}, {"url": "https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27"}], "title": "fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fa8dda1edef9ebc3af467c644c5533ac97171e12,59070040fd12e0b78d7b4d341d9f9a183237c5ff)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fa8dda1edef9ebc3af467c644c5533ac97171e12,fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[fa8dda1edef9ebc3af467c644c5533ac97171e12,fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,8.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T11:15:04.067029+00:00", "updated": "2026-07-25T11:15:04.067090+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}