CVE-2022-23034

A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would…

published January 25, 2022

CVSS
—
EPSS
0%
Percentile
25.8
In the wild
Unconfirmed
What it is

A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would have the IOMMU enabled. PV guests can request two forms of mappings. When both are in use for any individual mapping, unmapping of such a mapping can be requested in two steps. The reference count for such a mapping would then mistakenly be decremented twice. Underflow of the counters gets detected, resulting in the triggering of a hypervisor bug check.

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.00336 · 25.8th percentile
Published
2022-01-25T13:43Z
EPSS history
Timeline
  • 25 JAN 13:43Z
    A PV guest could DoS Xen while unmapping a grant To address XSA-380, reference counting was introduced for grant mappings for the case where a PV guest would…
    cvelistv5