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CVE-2022-23034

Status Candidate

Overview

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.

Related Files

Debian Security Advisory 5117-1
Posted Apr 28, 2022
Authored by Debian | Site debian.org

Debian Linux Security Advisory 5117-1 - Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in privilege escalation, denial of service or information leaks.

tags | advisory, denial of service, vulnerability
systems | linux, debian
advisories | CVE-2022-23033, CVE-2022-23034, CVE-2022-23035, CVE-2022-26356, CVE-2022-26357, CVE-2022-26358, CVE-2022-26359, CVE-2022-26360, CVE-2022-26361
SHA-256 | 819f8a49cd9f2ae6dc9a4768afc2e71a91e4114e4c5860d415894bcc9b37f10b
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