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CVE-2026-64131

kernel: mm/memory: fix spurious warning when unmapping device-private/exclusive pages

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · July 19, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's memory management subsystem. The unmapping process for device-private and exclusive memory pages incorrectly checks if a virtual memory area (VMA) is anonymous. This can lead to spurious warnings during process teardown when a folio is part of a private filebacked mapping, even though the folio itself is anonymous. This issue does not directly lead to a security vulnerability but indicates an underlying logic error in memory handling.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-480 · Use of Incorrect Operator