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2.1
CVSSv2

CVE-2022-23034

Published: 25/01/2022 Updated: 07/11/2023
CVSS v2 Base Score: 2.1 | Impact Score: 2.9 | Exploitability Score: 3.9
CVSS v3 Base Score: 5.5 | Impact Score: 3.6 | Exploitability Score: 1.8
VMScore: 188
Vector: AV:L/AC:L/Au:N/C:N/I:N/A:P
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Vulnerability Summary

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.

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Vendor Advisories

Debian Security Advisories: DSA-5117-1 xen -- security update
Multiple vulnerabilities have been discovered in the Xen hypervisor, which could result in privilege escalation, denial of service or information leaks For the stable distribution (bullseye), these problems have been fixed in version 4144+74-gd7b22226b5-1 We recommend that you upgrade your xen packages For the detailed security status of xen p ...
Citrix Security Bulletins: Security Advisory for Citrix Hypervisor
Description of Problem Several security issues have been identified that affect Citrix Hypervisor:An issue has been identified that may allow privileged code in a PV guest VM to cause the host to crash  This issue has the following identifier: CVE-2022-23034 Note that PV guests are supported in Citrix XenServer 71 LTSR but are not supported ...

References

CWE-191https://xenbits.xenproject.org/xsa/advisory-394.txthttp://www.openwall.com/lists/oss-security/2022/01/25/3https://www.debian.org/security/2022/dsa-5117https://security.gentoo.org/glsa/202208-23https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/https://www.debian.org/security/2022/dsa-5117https://nvd.nist.gov
CVSSv2
CVSSv2
CVSSv3
VMScore
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