CVE-2026-42488

x86: mismatched mapcache metadata

CVSS 8.1 HIGHEPSS 0.4%CWE-119

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.

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Produtos afetados

Xen · Xen

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Referências

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