Is CVE-2023-34326 actively exploited?

CVE-2023-34326 has no public evidence of in-the-wild exploitation as of 2025-11-04.

What is the CVSS score for CVE-2023-34326?

CVE-2023-34326 has a CVSS score of 7.8 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2023-34326?

Patch guidance is available from xen security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2023-34326.

Fix CVE-2023-34326 - HIGH xen xen

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.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector: local
Complexity: low
Privileges: low
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-noinfoCWE-672

Metadata

Primary Vendor: XEN
Published: 1/5/2024
Last Modified: 11/4/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2023-34326

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary