CVE-2025-27465
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-07-16

Last updated on: 2025-11-04

Assigner: Xen Project

Description
Certain instructions need intercepting and emulating by Xen. In some cases Xen emulates the instruction by replaying it, using an executable stub. Some instructions may raise an exception, which is supposed to be handled gracefully. Certain replayed instructions have additional logic to set up and recover the changes to the arithmetic flags. For replayed instructions where the flags recovery logic is used, the metadata for exception handling was incorrect, preventing Xen from handling the the exception gracefully, treating it as fatal instead.
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Meta Information
Published
2025-07-16
Last Modified
2025-11-04
Generated
2026-05-07
AI Q&A
2025-07-16
EPSS Evaluated
2026-05-05
NVD
CVE-2025-27465
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
xen xen *
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-755 The product does not handle or incorrectly handles an exceptional condition.
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability occurs in Xen when certain instructions that need to be intercepted and emulated are replayed using an executable stub. Some of these instructions may raise exceptions that Xen is supposed to handle gracefully. However, for replayed instructions that use flags recovery logic, the metadata for exception handling was incorrect. This caused Xen to treat these exceptions as fatal instead of handling them properly.


How can this vulnerability impact me? :

The impact of this vulnerability is that Xen may treat certain exceptions as fatal instead of handling them gracefully. This could potentially lead to crashes or instability in systems running Xen, affecting availability and reliability.


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