CVE-2025-21978

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 v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

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

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc5::::::
	cpe:2.3:o:linux:linux_kernel:6.14:rc6::::::

History

No history.

Information

Published : 2025-04-01 16:15

Updated : 2025-11-03 20:17

NVD link : CVE-2025-21978

Mitre link : CVE-2025-21978

CVE.ORG link : CVE-2025-21978

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-401

Missing Release of Memory after Effective Lifetime

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