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8.8
HIGH CVSS 3.1
CVE-2026-64280
fpga: dfl-afu: validate DMA mapping length in afu_dma_map_region()
Overview
Description

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.

Details
INFO

Published Date :

July 25, 2026, 10:17 a.m.

Last Modified :

Aug. 17, 2026, 5:17 a.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-64280 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Validate DMA mapping length in the Linux kernel's fpga: dfl-afu driver.
  • Apply the Linux kernel patch for the dfl-afu vulnerability.
  • Validate map.length at ioctl entry point.
  • Reject lengths exceeding INT_MAX page count.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-64280.

URL Resource
https://git.kernel.org/stable/c/16381bda90b261a656ded0568630c1b857b2ebc8 Patch
https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff Patch
https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6 Patch
https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231 Patch
https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 Patch
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-64280 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-64280 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-64280 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-64280 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 17, 2026

    Action Type Old Value New Value
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '16381bda90b261a656ded0568630c1b857b2ebc8', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'b50e6cd2395cde615f59b624819998d28c0668d6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '59070040fd12e0b78d7b4d341d9f9a183237c5ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27', 'versionType': 'git'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '16381bda90b261a656ded0568630c1b857b2ebc8', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'b50e6cd2395cde615f59b624819998d28c0668d6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '59070040fd12e0b78d7b4d341d9f9a183237c5ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27', 'versionType': 'git'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'affected'}]
  • Initial Analysis by [email protected]

    Aug. 13, 2026

    Action Type Old Value New Value
    Added CWE NVD-CWE-noinfo
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.18.39 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.19 up to (excluding) 7.1.4 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.101 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 4.19 up to (excluding) 6.6.148
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/16381bda90b261a656ded0568630c1b857b2ebc8 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27 Types: Patch
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 03, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/16381bda90b261a656ded0568630c1b857b2ebc8
    Added Reference https://git.kernel.org/stable/c/b50e6cd2395cde615f59b624819998d28c0668d6
    Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '59070040fd12e0b78d7b4d341d9f9a183237c5ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27', 'versionType': 'git'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '16381bda90b261a656ded0568630c1b857b2ebc8', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'b50e6cd2395cde615f59b624819998d28c0668d6', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '59070040fd12e0b78d7b4d341d9f9a183237c5ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27', 'versionType': 'git'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.6.148', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.101', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'affected'}]
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 27, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jul. 25, 2026

    Action Type Old Value New Value
    Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': '59070040fd12e0b78d7b4d341d9f9a183237c5ff', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231', 'versionType': 'git'}, {'status': 'affected', 'version': 'fa8dda1edef9ebc3af467c644c5533ac97171e12', 'lessThan': 'fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27', 'versionType': 'git'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '4.19'}, {'status': 'unaffected', 'version': '0', 'lessThan': '4.19', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.18.39', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.4', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/fpga/dfl-afu-main.c'], 'defaultStatus': 'affected'}]
    Added Description 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.
    Added Reference https://git.kernel.org/stable/c/59070040fd12e0b78d7b4d341d9f9a183237c5ff
    Added Reference https://git.kernel.org/stable/c/fb2c0eab51ae5b02d2bae7d67c2cfbec39b57231
    Added Reference https://git.kernel.org/stable/c/fc3b071a7c8dc0f5d56defddf6e6fd5aaa3e1e27
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 8.8
Attack Vector
Attack Complexity
Privileges Required
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Scope
Confidentiality Impact
Integrity Impact
Availability Impact