Name: CVE-2026-42493: Uncontrolled Resource Consumption
Creator: Rapid7
Published: 2026-07-28T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-42493, CWE-400, CVSS 7.5, EPSS 0.0045

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.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade xen	Aug 12, 2026	Jul 28, 2026
Debian	—	Upgrade xen	Aug 11, 2026	Jul 28, 2026

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CVSS Details

Covered by Rapid7

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