Memory Leak Affecting linux-virt package, versions <6.12.22-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.02% (6th percentile)

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  • Snyk IDSNYK-MINIMOSLATEST-LINUXVIRT-13797023
  • published1 Nov 2025
  • disclosed1 Apr 2025

Introduced: 1 Apr 2025

CVE-2025-21978  (opens in a new tab)
CWE-401  (opens in a new tab)

How to fix?

Upgrade Minimos:latest linux-virt to version 6.12.22-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-virt package and not the linux-virt package as distributed by Minimos. See How to fix? for Minimos:latest relevant fixed versions and status.

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

drm/hyperv: Fix address space leak when Hyper-V DRM device is removed

When a Hyper-V DRM device is probed, the driver allocates MMIO space for the vram, and maps it cacheable. If the device removed, or in the error path for device probing, the MMIO space is released but no unmap is done. Consequently the kernel address space for the mapping is leaked.

Fix this by adding iounmap() calls in the device removal path, and in the error path during device probing.

CVSS Base Scores

version 3.1