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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: XEN

Published: 2022-01-25T13:43:08

Updated: 2024-08-03T03:28:43.072Z

Reserved: 2022-01-10T00:00:00

Link: CVE-2022-23034

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2022-01-25T14:15:09.010

Modified: 2024-11-21T06:47:51.117

Link: CVE-2022-23034

cve-icon Redhat

Severity : Moderate

Publid Date: 2022-01-25T00:00:00Z

Links: CVE-2022-23034 - Bugzilla