CVE-2026-23093
Unknown Unknown - Not Provided

Improper DMA Unmapping in Linux ksmbd Causes Potential Data Corruption

Publication date: 2026-02-04

Last updated on: 2026-03-17

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ksmbd: smbd: fix dma_unmap_sg() nents The dma_unmap_sg() functions should be called with the same nents as the dma_map_sg(), not the value the map function returned.

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Meta Information

Published
2026-02-04
Last Modified
2026-03-17
Generated
2026-07-06
AI Q&A
2026-02-04
EPSS Evaluated
2026-07-05
NVD
CVE-2026-23093

Affected Vendors & Products

Showing 11 associated CPEs
Vendor Product Version / Range
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel 6.19
linux linux_kernel From 5.16 (inc) to 6.1.162 (exc)
linux linux_kernel From 5.15 (inc) to 5.15.199 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.123 (exc)
linux linux_kernel From 6.13 (inc) to 6.18.8 (exc)
linux linux_kernel 6.19
linux linux_kernel From 6.7 (inc) to 6.12.69 (exc)

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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 ksmbd component, specifically in the smbd module. The issue is related to the incorrect usage of the dma_unmap_sg() function, which should be called with the same number of scatter-gather entries (nents) as the dma_map_sg() function was called with, rather than the value returned by the map function.

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