CVE-2026-43045— Linux kernel 安全漏洞

mshv: Fix error handling in mshv_region_pin

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.

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Linux kernel 安全漏洞

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mshv_region_pin函数中pin_user_pages_fast返回短引脚计数时未正确处理，导致部分引脚区域被使用引发内存损坏，且错误处理时未正确计算当前批次已引脚页面导致页面引用泄漏。

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