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CVE PROGRAM SOURCE RECORD8.1 High

CVE-2026-42488

x86: mismatched mapcache metadata

Description

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Xen Xen

Default version status: unknown

  • consult Xen advisory XSA-494unknown

References