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CVE-2025-27466— Mutiple vulnerabilities in the Viridian interface

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，该漏洞源于处理访客内存页面时存在多个问题，包括更新参考TSC区域时的空指针取消引用、传递合成计时器消息时假设SIM页面已映射导致的空指针取消引用以及映射参考TSC页面时的竞争条件。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.47% · P38

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2025-27466

Vulnerability Information
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Vulnerability Title
Mutiple vulnerabilities in the Viridian interface
Source: CVE Program / CVE List V5
Vulnerability Description
[This CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] There are multiple issues related to the handling and accessing of guest memory pages in the viridian code: 1. A NULL pointer dereference in the updating of the reference TSC area. This is CVE-2025-27466. 2. A NULL pointer dereference by assuming the SIM page is mapped when a synthetic timer message has to be delivered. This is CVE-2025-58142. 3. A race in the mapping of the reference TSC page, where a guest can get Xen to free a page while still present in the guest physical to machine (p2m) page tables. This is CVE-2025-58143.
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，该漏洞源于处理访客内存页面时存在多个问题，包括更新参考TSC区域时的空指针取消引用、传递合成计时器消息时假设SIM页面已映射导致的空指针取消引用以及映射参考TSC页面时的竞争条件。
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-472 -

II. Public POCs for CVE-2025-27466

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III. Intelligence Information for CVE-2025-27466

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Same Patch Batch · Xen · 2025-09-11 · 5 CVEs total

CVE-2025-58142 Mutiple vulnerabilities in the Viridian interface
CVE-2025-58144 Arm issues with page refcounting
CVE-2025-58143 Mutiple vulnerabilities in the Viridian interface
CVE-2025-58145 Arm issues with page refcounting

IV. Related Vulnerabilities

Same product: Xen
Same vendor: Xen

V. Comments for CVE-2025-27466

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