CVE-2026-42493
HIGH
NVD
CVSS Score
7.5
Severity
HIGH
Published
Jul 28, 2026
Vendor
unknown
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.