CVE-2026-42488: x86: mismatched mapcache metadata
Published Jun 9, 2026
·Updated
Some shadow paging errors paths will switch the page-tables without updating the currently running vCPU reference. This causes a mismatch between the loaded page-tables and the mapcache metadata which can lead to corruption of the mapcache.
Affected Software
1 affected component
Xen Project Xen
Event History
Jun 18, 2026
CVE Published
via MITRE·01:47 PM
Data Sourced
via MITRE·01:47 PM
Description
Data Sourced
via NVD·02:17 PM
DescriptionSeverityWeakness
Frequently Asked Questions
1
What is the severity of CVE-2026-42488?
CVE-2026-42488 has a severity rating of high with a CVSS score of 8.1.
2
How do I fix CVE-2026-42488?
To fix CVE-2026-42488, users should apply the latest patches provided by the Xen Project.
3
What are the potential impacts of CVE-2026-42488?
CVE-2026-42488 can lead to corruption of the mapcache, impacting system stability and data integrity.
4
Which software is affected by CVE-2026-42488?
CVE-2026-42488 affects the Xen Project hypervisor software.
5
What type of vulnerability is CVE-2026-42488?
CVE-2026-42488 is classified as a buffer overflow vulnerability.