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CVE-2026-23558
Published: May 19, 2026
Modified: May 20, 2026
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.
| Vendor | Product | Versions |
|---|---|---|
Xen | Xen | unknown consult Xen advisory XSA-486 |
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