🛡️ CVE-2022-42335 — fedora

🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-476 NVD

7.8

CVSS Score

0 Low4 Medium7 High9 Critical10

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.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2022-42335 is classified as CWE-476: NULL Pointer Dereference. A pointer that can be null is used without a check, crashing the process.

Affected software

CVE-2022-42335 is recorded against 2 packages.

fedora
xen

Timeline and source

Published on 25 April 2023 and last revised on 17 June 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

www.openwall.com
xenbits.xen.org
lists.fedoraproject.org
security.gentoo.org
xenbits.xenproject.org
www.openwall.com
xenbits.xen.org
lists.fedoraproject.org
security.gentoo.org
xenbits.xenproject.org

CVE-2022-42335 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Alpine Debian Ubuntu

Details

Severity HIGH

CVSS Score 7.8

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

CWE CWE-476

Public Exploit ✅ No

Source NVD

Published 2023-04-25

Updated 2026-08-11

Modified 2026-06-17

Fix URL http://xenbits.xen.org/xsa/advisory-430.html

Affected Packages

Software	From version	Fixed in
fedora	—	—
xen	—	—

References

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/04/25/1

Patch, Vendor Advisory http://xenbits.xen.org/xsa/advisory-430.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/

https://security.gentoo.org/glsa/202402-07

Patch, Vendor Advisory https://xenbits.xenproject.org/xsa/advisory-430.txt

Mailing List, Third Party Advisory http://www.openwall.com/lists/oss-security/2023/04/25/1

Patch, Vendor Advisory http://xenbits.xen.org/xsa/advisory-430.html

https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/

https://security.gentoo.org/glsa/202402-07

Patch, Vendor Advisory https://xenbits.xenproject.org/xsa/advisory-430.txt

🔗 NVD 🔗 Mitre ✅ Fix / Advisory

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