Bug 2490341 (CVE-2026-42488) - CVE-2026-42488 xen: x86: mismatched mapcache metadata
Summary: CVE-2026-42488 xen: x86: mismatched mapcache metadata
Keywords:
Status: NEW
Alias: CVE-2026-42488
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2490538
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-18 15:01 UTC by OSIDB Bzimport
Modified: 2026-06-18 18:38 UTC (History)
0 users

Fixed In Version:
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Description OSIDB Bzimport 2026-06-18 15:01:44 UTC 
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.
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