CVE-2025-68205
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: hda/hdmi: Fix breakage at probing nvhdmi-mcp driver After restructuring and splitting the HDMI codec driver code, each HDMI codec driver contains the own build_controls and build_pcms ops. A copy-n-paste error put the wrong entries for nvhdmi-mcp driver; both build_controls and build_pcms are swapped. Unfortunately both callbacks have the very same form, and the compiler didn't complain it, either. This resulted in a NULL dereference because the PCM instance hasn't been initialized at calling the build_controls callback. Fix it by passing the proper entries.
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Meta Information
Published
2025-12-16
Last Modified
2025-12-18
Generated
2026-06-16
AI Q&A
2025-12-16
EPSS Evaluated
2026-06-15
NVD
CVE-2025-68205
EUVD
EUVD-2025-203691
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 is a bug in the Linux kernel's ALSA HDMI codec driver for the nvhdmi-mcp device. Due to a copy-paste error during code restructuring, the functions build_controls and build_pcms were swapped for this driver. Both functions have the same form, so the compiler did not detect the mistake. This caused a NULL pointer dereference because the PCM instance was not initialized when build_controls was called.

Impact Analysis

The vulnerability can cause a NULL pointer dereference in the Linux kernel when probing the nvhdmi-mcp HDMI codec driver. This may lead to system instability or crashes during device initialization, potentially affecting system reliability.

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