CVE-2025-27465: x86: Incorrect stubs exception handling for flags recovery
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.
Affected Software
Remediation
Patch Available
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2025-27465?
CVE-2025-27465 has been classified as a high-severity vulnerability due to its potential to affect system stability and security.
How do I fix CVE-2025-27465?
To fix CVE-2025-27465, update your Xen Project Xen installation to the latest version where the vulnerability has been addressed.
What versions of Xen Project Xen are affected by CVE-2025-27465?
CVE-2025-27465 affects all versions of Xen Project Xen prior to the security patch release.
Can CVE-2025-27465 lead to unauthorized access?
Yes, CVE-2025-27465 may potentially allow unauthorized access or manipulation of sensitive data depending on the exploit's execution.
What types of systems are primarily impacted by CVE-2025-27465?
Systems running virtualization environments using Xen Project Xen are primarily impacted by CVE-2025-27465.