Instruction Emulation Flaw in Xen Hypervisor

CVE-2025-27465

What is CVE-2025-27465?

A flaw exists in the instruction emulation logic of the Xen Hypervisor, where certain replayed instructions do not handle exceptions as expected. When the arithmetic flags recovery logic is triggered, the metadata involved in exception handling is incorrect, leading to failures in graceful exception management. As a result, what should have been a handled exception is treated as fatal, potentially compromising the stability of the system. This highlights the need for careful review and updates to ensure the integrity and reliability of the Xen Hypervisor.

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