Security Advisory

CVE-2026-23558

CVE vulnerability detail - eXtreme Datacenter Security Operations

Published 2026-05-19 12:49:54

Last updated 2026-05-20 03:55:35

Assigner XEN

CVSS score not scored

State PUBLISHED

Description

The adjustments made for XSA-379 as well as those subsequently becoming XSA-387 still left a race window, when a HVM or PVH guest does a grant table version change from v2 to v1 in parallel with mapping the status page(s) via XENMEM_add_to_physmap. Some of the status pages may then be freed while mappings of them would still be inserted into the guest's secondary (P2M) page tables.

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