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CVE-2025-27465— x86: Incorrect stubs exception handling for flags recovery

Quick assessment

Affected
Xen Xen
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Xen是Xen开源的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen存在安全漏洞，该漏洞源于异常处理元数据不正确，可能导致指令重放时异常处理失败。

AI Predicted 4.9 Difficulty: Hard EPSS 0.60% · P46

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions
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I. Basic Information for CVE-2025-27465

Vulnerability Information
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Vulnerability Title
x86: Incorrect stubs exception handling for flags recovery
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Xen 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xen是Xen开源的一款开源的虚拟机监视器产品。该产品能够使不同和不兼容的操作系统运行在同一台计算机上，并支持在运行时进行迁移，保证正常运行并且避免宕机。 Xen存在安全漏洞，该漏洞源于异常处理元数据不正确，可能导致指令重放时异常处理失败。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Xen Xen consult Xen advisory XSA-470 -

II. Public POCs for CVE-2025-27465

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III. Intelligence Information for CVE-2025-27465

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IV. Related Vulnerabilities

Same product: Xen
Same vendor: Xen

V. Comments for CVE-2025-27465

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