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CVE-2022-42335

Date: April 25, 2023

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.

Language: C

Severity Score

Related Resources (10)

https://security.gentoo.org/glsa/202402-07
http://xenbits.xen.org/xsa/advisory-430.html
https://seclists.org/oss-sec/2023/q2/att-103/xsa430.patch
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
https://xenbits.xenproject.org/xsa/advisory-430.txt
http://www.openwall.com/lists/oss-security/2023/04/25/1
https://seclists.org/oss-sec/2023/q2/103
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PSPFWSY6UOPGMADQGOGN2PAAS5LJRPTG/
https://nvd.nist.gov/vuln/detail/CVE-2022-42335
https://www.mend.io/vulnerability-database/CVE-2022-42335

Severity Score

Weakness Type (CWE)

NULL Pointer Dereference

CWE-476

CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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