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CVE-2025-68205

kernel: ALSA: hda/hdmi: Fix breakage at probing nvhdmi-mcp driver

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Severity

Unknown

Red Hat Product Security

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CVSS

Review impact separately from score.

Published · December 16, 2025

Updated · June 30, 2026

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.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE not specified