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CVE-2022-26361

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是英国剑桥（Cambridge）大学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，该漏洞源于系统中的某些PCI设备为Intel VT-d或AMD-Vi分配了保留内存的区域，由于这些区域的确切用途未知，因此一旦与此类区域相关联的设备处于活动状态，这些区域的映射需要保持设备可以连续访问，随后的DMA或设备中断不可预测，从IOMMU故障到内存损坏。

AI Predicted 6.8 Difficulty: Moderate EPSS 0.35% · P28

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection
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I. Basic Information for CVE-2022-26361

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.
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是英国剑桥（Cambridge）大学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，该漏洞源于系统中的某些PCI设备为Intel VT-d或AMD-Vi分配了保留内存的区域，由于这些区域的确切用途未知，因此一旦与此类区域相关联的设备处于活动状态，这些区域的映射需要保持设备可以连续访问，随后的DMA或设备中断不可预测，从IOMMU故障到内存损坏。
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-400 -

II. Public POCs for CVE-2022-26361

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III. Intelligence Information for CVE-2022-26361

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Vendor Advisories for CVE-2022-26361 (2)

Mailing List Discussions for CVE-2022-26361 (3)

Other References for CVE-2022-26361 (1)

Other References for CVE-2022-26361 (1)

Same Patch Batch · Xen · 2022-04-05 · 6 CVEs total

CVE-2022-26356 Xen 安全漏洞
CVE-2022-26357 Xen 竞争条件问题漏洞
CVE-2022-26358 Xen 安全漏洞
CVE-2022-26359 Xen 安全漏洞
CVE-2022-26360 Xen 安全漏洞

IV. Related Vulnerabilities

Same product: xen
Same vendor: Xen

V. Comments for CVE-2022-26361

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