CVE-2026-23558
grant table v2 race in status page mapping
Vexday Risk Score
21Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 7.8EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —
Ciclo de vida
19 may 2026Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
Productos afectados
Xen · Xen¿Quieres saber si tu infraestructura está expuesta a esto?
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