The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.
Vulnerable Product | Search on Vulmon | Subscribe to Product |
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xen xen 4.0.0 |
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canonical ubuntu linux 12.04 |