CVE-2026-42493
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.
- Score
- CVSS 3.1 7.5 High
- Status
- Deferred - security@xen.org
- Published
- 2026-07-28
- Last modified
- 2026-07-28
- Weaknesses
- CWE-400
Affected products
References
- https://xenbits.xenproject.org/xsa/advisory-495.html
- http://www.openwall.com/lists/oss-security/2026/07/28/12
- http://xenbits.xen.org/xsa/advisory-495.html
