CVE-2025-21978
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedApr 1, 2025
First seenApr 1, 2025
Weakness typeCWE-401CWE-401
How to fix
Update
- linux linux_kernel6.1.132, 6.6.84, 6.12.20, 6.13.8 or later
Patches
- git.kernel.org/stable/c/158242b56bf465a73e1edeac0fe828a8acad4499
- git.kernel.org/stable/c/24f1bbfb2be77dad82489c1468bbb14312aab129
- git.kernel.org/stable/c/ad27b4a51495490b815580d9b935e8eee14d1a9c
- git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e
- git.kernel.org/stable/c/c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 6.0 ≤ v < 6.1.132, 6.2 ≤ v < 6.6.84, 6.7 ≤ v < 6.12.20, 6.13 ≤ v < 6.13.8, 6.14 | 6.1.132, 6.6.84, 6.12.20, 6.13.8 |
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