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MitreCVELIST:CVE-2021-28039HistoryMar 05, 2021 - 12:00 a.m.
CVE-2021-28039
2021-03-0500:00:00
mitre
www.cve.org
6
linux kernel
xen
pv guest os
dom0
driver domain
i/o activity
guest physical addresses
memory hotplug
An issue was discovered in the Linux kernel 5.9.x through 5.11.3, as used with Xen. In some less-common configurations, an x86 PV guest OS user can crash a Dom0 or driver domain via a large amount of I/O activity. The issue relates to misuse of guest physical addresses when a configuration has CONFIG_XEN_UNPOPULATED_ALLOC but not CONFIG_XEN_BALLOON_MEMORY_HOTPLUG.
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