Memory Handling Flaw in Xen Hypervisor Affecting Multiple Hypervisor Operations

CVE-2026-62428

What is CVE-2026-62428?

A vulnerability exists in the Xen Hypervisor related to the handling of grant-copy operations. When multiple operations are performed on a grant, the state of the grant may be inconsistent due to a potential race condition. If a grant is pinned by one operation while another copy operation attempts to use it, there may be discrepancies in the permission checks, leading to a scenario where operations could be executed on an incorrect memory page. This inconsistency can expose vulnerabilities within the system, impacting the overall security and stability of virtualized environments.

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