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Linux CVE-2026-64280

| EUVDEUVD-2026-48992 HIGH
2026-07-25 Linux GHSA-hj85-3f53-vrg4
Information Disclosure Linux
8.8
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
8.8 HIGH
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
SUSE
5.5 MEDIUM
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Red Hat
7.0 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Jul 27, 2026 - 05:30 vuln.today
CVSS changed
Jul 27, 2026 - 05:22 NVD
8.8 (HIGH)
Patch available
Jul 25, 2026 - 11:18 EUVD
CVE Published
Jul 25, 2026 - 08:49 cve.org
UNKNOWN (no severity yet)
CVE Published
Jul 25, 2026 - 08:49 cve.org
HIGH 8.8

DescriptionCVE.org

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.

AnalysisAI

An integer truncation vulnerability in the Linux kernel's FPGA DFL-AFU driver allows a local attacker with low privileges to trigger memory corruption by sending a crafted DMA map ioctl. The issue arises from a missing upper bound check on a 64-bit length parameter from userspace, leading to an undersized pin of memory pages and potential out-of-bounds access. This can result in privilege escalation to root, impacting systems with the dfl-afu module loaded. No active exploitation or public exploit code has been identified at time of analysis.

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Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise Desktop 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Affected
SUSE Linux Enterprise High Availability Extension 16.0 Affected

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CVE-2026-64280 vulnerability details – vuln.today
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