x86/HVM Cache Attribute Mismanagement in Xen Products
CVE-2022-42334
6.5MEDIUM
What is CVE-2022-42334?
The vulnerability in the Xen Hypervisor arises from improper handling of pinned cache attributes for HVM guests with passed-through devices. An exposed interface intended to control cachability settings can be exploited by entities with limited privileges, such as qemu in Dom0 or in a stub-domain. This leads to unbounded control over cache regions and inadequate serialization during their installation and removal, which may compromise the integrity and security of virtualized environments.
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Affected Version(s)
xen consult Xen advisory XSA-428
References
CVSS V3.1
Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed
Timeline
Vulnerability published
Vulnerability Reserved
Credit
{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'Aspects of this issue were discovered by Andrew Cooper of XenServer and\nJan Beulich of SUSE.'}]}}}