CVE-2026-46301
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spi: topcliff-pch use-after-free on driver unbind

Vulnerability report for CVE-2026-46301, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-06-08

Last updated on: 2026-07-08

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: spi: topcliff-pch: fix use-after-free on unbind Give the driver a chance to flush its queue before releasing the DMA buffers on driver unbind

CVSS Scores

EPSS Scores

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Meta Information

Published
2026-06-08
Last Modified
2026-07-08
Generated
2026-07-19
AI Q&A
2026-06-08
EPSS Evaluated
2026-07-18
NVD
EUVD

Affected Vendors & Products

Showing 7 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.13 (inc) to 6.18.30 (exc)
linux linux_kernel From 5.16 (inc) to 6.1.175 (exc)
linux linux_kernel From 5.11 (inc) to 5.15.209 (exc)
linux linux_kernel From 6.19 (inc) to 7.0.7 (exc)
linux linux_kernel From 6.7 (inc) to 6.12.88 (exc)
linux linux_kernel From 6.2 (inc) to 6.6.140 (exc)
linux linux_kernel From 3.1 (inc) to 5.10.258 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's topcliff-pch SPI driver. It occurs when the driver unbinds and releases DMA buffers without properly flushing its queue first, which can lead to accessing memory that has already been freed.

Impact Analysis

The use-after-free vulnerability can cause system instability or crashes due to invalid memory access. It may also potentially be exploited to execute arbitrary code or cause denial of service, depending on the context in which the driver operates.

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EPSS Chart