CVE-2022-23034

 

Published at: - 25-01-2022 03:15

Last modified: - 19-08-2022 11:59

Total changes: - 8

Description

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://xenbits.xenproject.org/xsa/advisory-394.txt
• [oss-security] 20220125 Xen Security Advisory 394 v3 (CVE-2022-23034) - A PV guest could DoS Xen while unmapping a grant-Mailing List, Third Party Advisory
• FEDORA-2022-0cc3916e08-Mailing List, Third Party Advisory
• DSA-5117-Third Party Advisory
• GLSA-202208-23-Third Party Advisory

 

Keywords

NVD

 

CVE-2022-23034

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures