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CVE PROGRAM SOURCE RECORDUnscored

CVE-2021-28706

guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation bey

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Status
Published
Published
Updated
Assigning organization
XEN

Description

guests may exceed their designated memory limit When a guest is permitted to have close to 16TiB of memory, it may be able to issue hypercalls to increase its memory allocation beyond the administrator established limit. This is a result of a calculation done with 32-bit precision, which may overflow. It would then only be the overflowed (and hence small) number which gets compared against the established upper bound.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Xen xen

  • 4.12.xaffected

Xen xen

  • unspecified to < 4.12unknown
  • 4.14.x to < unspecifiedaffected
  • next of 4.15.x to < unspecifiedunaffected

Xen xen

  • xen-unstableaffected

Xen xen

  • 4.13.xaffected

References