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CVE PROGRAM SOURCE RECORD7.5 High

CVE-2026-42493

x86 shadow paging is deprecated

Description

Addressing certain issues, in particular related to operations which may take excessively long and therefore would need preemption, has turned out overly costly. Since alternatives (HVM/PVH: HAP, PV: shim) are commonly available, the decision was to deprecate the functionality, while still retaining it for people to use at their own (security) risk. Memory-wise small enough guests may still be okay to run.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Xen Xen

Default version status: unknown

  • consult Xen advisory XSA-495unknown

References