CVE-2022-42335
HIGHXen - Unauthenticated Arbitrary Pointer Dereference in Shadow Paging
Title source: llmDescription
x86 shadow paging arbitrary pointer dereference In environments where host assisted address translation is necessary but Hardware Assisted Paging (HAP) is unavailable, Xen will run guests in so called shadow mode. Due to too lax a check in one of the hypervisor routines used for shadow page handling it is possible for a guest with a PCI device passed through to cause the hypervisor to access an arbitrary pointer partially under guest control.
References (5)
Core 5
Core References
Patch, Vendor Advisory
http://xenbits.xen.org/xsa/advisory-430.html
Patch, Vendor Advisory
https://xenbits.xenproject.org/xsa/advisory-430.txt
Mailing List, Third Party Advisory mailing-list
http://www.openwall.com/lists/oss-security/2023/04/25/1
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
Third Party Advisory vendor-advisory
https://security.gentoo.org/glsa/202402-07
Scores
CVSS v3
7.8
EPSS
0.0009
EPSS Percentile
25.8%
Attack Vector
LOCAL
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Details
CWE
CWE-476
Status
published
Products (2)
fedoraproject/fedora
38
xen/xen
4.17.0
Published
Apr 25, 2023
Tracked Since
Feb 18, 2026