CVE-2023-34326— x86/AMD: missing IOMMU TLB flushing
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I. Basic Information for CVE-2023-34326
Vulnerability Information
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Vulnerability Title
x86/AMD: missing IOMMU TLB flushing
Source: NVD (National Vulnerability Database)
Vulnerability Description
The caching invalidation guidelines from the AMD-Vi specification (48882—Rev 3.07-PUB—Oct 2022) is incorrect on some hardware, as devices will malfunction (see stale DMA mappings) if some fields of the DTE are updated but the IOMMU TLB is not flushed. Such stale DMA mappings can point to memory ranges not owned by the guest, thus allowing access to unindented memory regions.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
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x86/AMD组件存在安全漏洞。攻击者可利用该漏洞造成拒绝服务（DoS）或信息泄露。
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
II. Public POCs for CVE-2023-34326
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Same Patch Batch · Xen · 2024-01-05 · 10 CVEs total
| CVE-2023-46837 | arm32: The cache may not be properly cleaned/invalidated (take two) | |
| CVE-2023-46836 | x86: BTC/SRSO fixes not fully effective | |
| CVE-2023-46835 | x86/AMD: mismatch in IOMMU quarantine page table levels | |
| CVE-2023-34327 | x86/AMD: Debug Mask handling | |
| CVE-2023-34328 | x86/AMD: Debug Mask handling | |
| CVE-2023-34325 | Multiple vulnerabilities in libfsimage disk handling | |
| CVE-2023-34323 | xenstored: A transaction conflict can crash C Xenstored | |
| CVE-2023-34322 | top-level shadow reference dropped too early for 64-bit PV guests | |
| CVE-2023-34321 | arm32: The cache may not be properly cleaned/invalidated |
IV. Related Vulnerabilities
V. Comments for CVE-2023-34326
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