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CVE-2026-23558

HIGH · CVSS 7.8 EPSS 0.12%

Source: NVD + CISA KEV + EPSS · Published: 2026-05-19 · Last synced: 2026-06-17

CyberRota Analysis

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CVE
CVE-2026-23558
Severity
HIGH
CVSS
7.8
EPSS
0.12%

Original NVD 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.