CVE-2022-42335

Description

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.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.06%
Vendor Advisory fedoraproject.org Vendor Advisory gentoo.org Vendor Advisory xen.org Vendor Advisory xenproject.org
Affected: Xen xen
Published at:
Updated at:

References

Link Tags
https://xenbits.xenproject.org/xsa/advisory-430.txt patch vendor advisory
http://xenbits.xen.org/xsa/advisory-430.html patch vendor advisory
http://www.openwall.com/lists/oss-security/2023/04/25/1 third party advisory mailing list
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/ vendor advisory
https://security.gentoo.org/glsa/202402-07 vendor advisory

Frequently Asked Questions

What is the severity of CVE-2022-42335?
CVE-2022-42335 has been scored as a high severity vulnerability.
How to fix CVE-2022-42335?
To fix CVE-2022-42335, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-42335 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-42335 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-42335?
CVE-2022-42335 affects Xen xen.
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