CVE-2023-54043
Unknown Unknown - Not Provided
Linked List Corruption in Linux Kernel iommufd HWPT Attachment

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: iommufd: Do not add the same hwpt to the ioas->hwpt_list twice The hwpt is added to the hwpt_list only during its creation, it is never added again. This hunk is some missed leftover from rework. Adding it twice will corrupt the linked list in some cases. It effects HWPT specific attachment, which is something the test suite cannot cover until we can create a legitimate struct device with a non-system iommu "driver" (ie we need the bus removed from the iommu code)
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Meta Information
Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-06-16
AI Q&A
2025-12-24
EPSS Evaluated
2026-06-15
NVD
CVE-2023-54043
EUVD
EUVD-2023-60283
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability in the Linux kernel involves the iommufd component where the same hardware page table (hwpt) is added twice to the ioas->hwpt_list linked list. Normally, the hwpt is added only once during its creation, but due to a leftover code issue, it can be added twice, which may corrupt the linked list in some cases.

Impact Analysis

The impact of this vulnerability is that adding the same hwpt twice can corrupt the linked list managing hardware page tables, potentially leading to instability or malfunction in the hardware page table attachment process within the Linux kernel's IOMMU framework. However, the exact impact is limited to HWPT specific attachment scenarios, which are not covered by the test suite until a legitimate struct device with a non-system IOMMU driver can be created.

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