CVE - CVE-2022-23033

CVE-ID
CVE-2022-23033	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
DEBIAN:DSA-5117 URL:https://www.debian.org/security/2022/dsa-5117 FEDORA:FEDORA-2022-0cc3916e08 URL:https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OMR6UBGJW6JKND7IILGQ2CU35EQPF3E3/ GENTOO:GLSA-202208-23 URL:https://security.gentoo.org/glsa/202208-23 MISC:https://xenbits.xenproject.org/xsa/advisory-393.txt URL:https://xenbits.xenproject.org/xsa/advisory-393.txt MLIST:[oss-security] 20220125 Xen Security Advisory 393 v2 (CVE-2022-23033) - arm: guest_physmap_remove_page not removing the p2m mappings URL:http://www.openwall.com/lists/oss-security/2022/01/25/2
Assigning CNA
Xen Project
Date Record Created
20220110	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20220110)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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