What’s Vulnerable › Vulnerabilities

CVE-2025-68743: mshv: Fix create memory region overlap check

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-10-13

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.

Affected products

• Linux kernel: 6.15 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2183924dd834e0703f87e17c17e689bcbf55d69d
• https://git.kernel.org/stable/c/ab3e7a78d83a61d335458cfe2e4d17eba69ae73d
• https://git.kernel.org/stable/c/ba9eb9b86d232854e983203dc2fb1ba18e316681

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