CVE-2026-42493 — x86 shadow paging is deprecated
Addressing certain issues, in particular related to operations which may take excessively long and therefore would need preemption, has turned out overly costly. Since alternat…
Published: 2026-07-28 · CVSS: 7.5 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7