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CVE-2022-23033 Detail

Description

arm: guest_physmap_remove_page not removing the p2m mappings The functions to remove one or more entries from a guest p2m pagetable on Arm (p2m_remove_mapping, guest_physmap_remove_page, and p2m_set_entry with mfn set to INVALID_MFN) do not actually clear the pagetable entry if the entry doesn't have the valid bit set. It is possible to have a valid pagetable entry without the valid bit set when a guest operating system uses set/way cache maintenance instructions. For instance, a guest issuing a set/way cache maintenance instruction, then calling the XENMEM_decrease_reservation hypercall to give back memory pages to Xen, might be able to retain access to those pages even after Xen started reusing them for other purposes.


Metrics

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CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
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References to Advisories, Solutions, and Tools

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Hyperlink Resource
http://www.openwall.com/lists/oss-security/2022/01/25/2 Mailing List  Patch  Third Party Advisory 
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/
https://security.gentoo.org/glsa/202208-23 Third Party Advisory 
https://www.debian.org/security/2022/dsa-5117 Third Party Advisory 
https://xenbits.xenproject.org/xsa/advisory-393.txt Vendor Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-404 Improper Resource Shutdown or Release cwe source acceptance level NIST  

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Change History

10 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-23033
NVD Published Date:
01/25/2022
NVD Last Modified:
11/06/2023
Source:
Xen Project