CVE-2025-68743
Unknown Unknown - Not Provided
Memory Region Overlap Vulnerability in Linux Kernel mshv Component

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: mshv: Fix create memory region overlap check The current check is incorrect; it only checks if the beginning or end of a region is within an existing region. This doesn't account for userspace specifying a region that begins before and ends after an existing region. Change the logic to a range intersection check against gfns and uaddrs for each region. Remove mshv_partition_region_by_uaddr() as it is no longer used.
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2025-68743
EUVD
EUVD-2025-205219
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel's mshv component involves an incorrect check for overlapping memory regions. The existing check only verifies if the start or end of a new memory region falls within an existing region, but it fails to detect cases where a new region starts before and ends after an existing region, causing an overlap. The fix changes the logic to properly check for any range intersection between memory regions.

Impact Analysis

This vulnerability could allow userspace to create overlapping memory regions in the mshv component, potentially leading to memory corruption or unexpected behavior in the kernel. This could affect system stability or security by allowing improper memory access or manipulation.

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