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CVE-2025-27465

Good to know:

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Date: July 16, 2025

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.

Severity Score

Related Resources (4)

https://seclists.org/oss-sec/2025/q3/0
https://nvd.nist.gov/vuln/detail/CVE-2025-27465
https://xenbits.xenproject.org/xsa/advisory-470.html
https://www.mend.io/vulnerability-database/CVE-2025-27465

Severity Score

Weakness Type (CWE)

Uncaught Exception

CWE-248

Improper Handling of Exceptional Conditions

CWE-755

Top Fix

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Upgrade Version

Upgrade to version https://github.com/xen-project/xen.git - no_fix

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): LOW

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