CVE-2022-42335

Name: CVE-2022-42335
Creator: NVD / NIST
Published: 2023-04-25T13:15:09.643+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2022-42335 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

7.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.26%

17.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Xen	Xen	4.17.0
Fedoraproject	Fedora	38

References

http://www.openwall.com/lists/oss-security/2023/04/25/1Mailing List, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-430.htmlPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
https://security.gentoo.org/glsa/202402-07
https://xenbits.xenproject.org/xsa/advisory-430.txtPatch, Vendor Advisory
http://www.openwall.com/lists/oss-security/2023/04/25/1Mailing List, Third Party Advisory
http://xenbits.xen.org/xsa/advisory-430.htmlPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
https://security.gentoo.org/glsa/202402-07
https://xenbits.xenproject.org/xsa/advisory-430.txtPatch, Vendor Advisory

Timeline

Published: Apr 25, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-42335?

How severe is CVE-2022-42335?

CVE-2022-42335 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2022-42335?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-42335?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST