CVE-2026-43045Medium· 5.5▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: mshv: Fix error handling in mshv_region_pin The current error handling has two issues: First, pin_user_pages_fast() can return a short pin count (less than requested …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.1%
— → 5.5
none → medium
In the Linux kernel, the following vulnerability has been resolved:
mshv: Fix error handling in mshv_region_pin
The current error handling has two issues:
First, pin_user_pages_fast() can return a short pin count (less than requested but greater than zero) when it cannot pin all requested pages. This is treated as success, leading to partially pinned regions being used, which causes memory corruption.
Second, when an error occurs mid-loop, already pinned pages from the current batch are not properly accounted for before calling mshv_region_invalidate_pages(), causing a page reference leak.
Treat short pins as errors and fix partial batch accounting before cleanup.
linux_kernel >= 6.15, < 6.19.12linux_kernel = 7.0Upgrade past the affected range:
linux_kernel 6.19.12Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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