CVE-2025-21978 (GCVE-0-2025-21978)

Vulnerability from cvelistv5 – Published: 2025-04-01 15:47 – Updated: 2025-11-03 19:40
VLAI?
Title
drm/hyperv: Fix address space leak when Hyper-V DRM device is removed
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a0ab5abced550ddeefddb06055ed60779a54eb79 , < c40cd24bfb9bfbb315c118ca14ebe6cf52e2dd1e (git)
Affected: a0ab5abced550ddeefddb06055ed60779a54eb79 , < ad27b4a51495490b815580d9b935e8eee14d1a9c (git)
Affected: a0ab5abced550ddeefddb06055ed60779a54eb79 , < 24f1bbfb2be77dad82489c1468bbb14312aab129 (git)
Affected: a0ab5abced550ddeefddb06055ed60779a54eb79 , < 158242b56bf465a73e1edeac0fe828a8acad4499 (git)
Affected: a0ab5abced550ddeefddb06055ed60779a54eb79 , < aed709355fd05ef747e1af24a1d5d78cd7feb81e (git)
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    Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.132 , ≤ 6.1.* (semver)
Unaffected: 6.6.84 , ≤ 6.6.* (semver)
Unaffected: 6.12.20 , ≤ 6.12.* (semver)
Unaffected: 6.13.8 , ≤ 6.13.* (semver)
Unaffected: 6.14 , ≤ * (original_commit_for_fix)
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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