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CVE-2024-31143— double unlock in x86 guest IRQ handling

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 PCI MSI 的一个可选功能 Multiple Message 允许设备使用多个连续的中断向量，在某些情况下可能导致错误的释放锁。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.51% · P41

Possible ATT&CK Techniques 1 AI

T1562.001
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I. Basic Information for CVE-2024-31143

Vulnerability Information
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Vulnerability Title
double unlock in x86 guest IRQ handling
Source: CVE Program / CVE List V5
Vulnerability Description
An optional feature of PCI MSI called "Multiple Message" allows a device to use multiple consecutive interrupt vectors. Unlike for MSI-X, the setting up of these consecutive vectors needs to happen all in one go. In this handling an error path could be taken in different situations, with or without a particular lock held. This error path wrongly releases the lock even when it is not currently held.
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 PCI MSI 的一个可选功能 Multiple Message 允许设备使用多个连续的中断向量，在某些情况下可能导致错误的释放锁。
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-458 -

II. Public POCs for CVE-2024-31143

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III. Intelligence Information for CVE-2024-31143

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Vendor Advisories for CVE-2024-31143 (1)

IV. Related Vulnerabilities

Same product: Xen
Same vendor: Xen

V. Comments for CVE-2024-31143

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