CVE-2026-42488

Severity CVSS v4.0:

Pending analysis

Type:

CWE-119 Buffer Errors

Publication date:

18/06/2026

Last modified:

22/06/2026

Description

Some shadow paging errors paths will switch the page-tables without<br /> updating the currently running vCPU reference. This causes a mismatch<br /> between the loaded page-tables and the mapcache metadata which can lead<br /> to corruption of the mapcache.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 8.10 HIGH
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

8.10

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://xenbits.xenproject.org/xsa/advisory-494.html
http://www.openwall.com/lists/oss-security/2026/06/09/14
http://xenbits.xen.org/xsa/advisory-494.html