Description
In the Linux kernel, the following vulnerability has been resolved:

io_uring/rsrc: don't rely on user vaddr alignment

There is no guaranteed alignment for user pointers, however the
calculation of an offset of the first page into a folio after coalescing
uses some weird bit mask logic, get rid of it.
Published: 2025-12-04
Score: 7.0 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Sat, 06 Dec 2025 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

threat_severity

Moderate

Thu, 04 Dec 2025 14:30:00 +0000

Type Values Removed Values Added
Description In the Linux kernel, the following vulnerability has been resolved: io_uring/rsrc: don't rely on user vaddr alignment There is no guaranteed alignment for user pointers, however the calculation of an offset of the first page into a folio after coalescing uses some weird bit mask logic, get rid of it.
Title io_uring/rsrc: don't rely on user vaddr alignment
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
References

Subscriptions

Linux Linux Kernel
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2026-05-11T21:45:00.870Z

Reserved: 2025-04-16T07:20:57.179Z

Link: CVE-2025-40216

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2025-12-04T15:15:57.300

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-40216

cve-icon Redhat

Severity : Moderate

Publid Date: 2025-12-04T00:00:00Z

Links: CVE-2025-40216 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses

No weakness.