CVE-2025-21978 | BDVDB-2026-272802 Detail
LinuxLinux
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.
Impact#
No impact statement in the source data.
Weaknesses#
No weakness recorded in the source data.
References#
- https://git.kernel.org/stable/c/c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e
- https://git.kernel.org/stable/c/ad27b4a51495490b815580d9b935e8eee14d1a9c
- https://git.kernel.org/stable/c/24f1bbfb2be77dad82489c1468bbb14312aab129
- https://git.kernel.org/stable/c/158242b56bf465a73e1edeac0fe828a8acad4499
- https://git.kernel.org/stable/c/aed709355fd05ef747e1af24a1d5d78cd7feb81e
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Exploit#
No public exploit known
History#
- Version 1Record published in the CVE List.
- Version 2Most recent update recorded in the CVE List.