CVE-2025-68205
kernel: ALSA: hda/hdmi: Fix breakage at probing nvhdmi-mcp driver
Severity
UnknownRed Hat Product Security
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