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.
References (3)
Core 3
Core References
Various Sources
http://xenbits.xen.org/xsa/advisory-495.html
Scores
CVSS v3
7.5
EPSS
0.0047
EPSS Percentile
38.5%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-400
Status
published
Products (1)
Xen/Xen
consult Xen advisory XSA-495
Published
Jul 28, 2026
Tracked Since
Jul 28, 2026