CVE-2025-21978

MEDIUM EPSS 6.0%
Published Apr 1, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 1, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

Description

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 Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
6.0% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-401

Affected Products 10

VendorProductVersionRange
linuxlinux_kernel*≥6.0  –  <6.1.132
linuxlinux_kernel*≥6.2  –  <6.6.84
linuxlinux_kernel*≥6.7  –  <6.12.20
linuxlinux_kernel*≥6.13  –  <6.13.8
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any
linuxlinux_kernel6.14any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/158242b56bf465a73e1edeac0fe828a8acad4499
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/24f1bbfb2be77dad82489c1468bbb14312aab129
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ad27b4a51495490b815580d9b935e8eee14d1a9c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/158242b56bf465a73e1edeac0fe828a8acad4499
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/24f1bbfb2be77dad82489c1468bbb14312aab129
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ad27b4a51495490b815580d9b935e8eee14d1a9c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e
    Patch