Bug 2422663 (CVE-2025-68205) - CVE-2025-68205 kernel: ALSA: hda/hdmi: Fix breakage at probing nvhdmi-mcp driver
Summary: CVE-2025-68205 kernel: ALSA: hda/hdmi: Fix breakage at probing nvhdmi-mcp driver
Keywords:
Status: NEW
Alias: CVE-2025-68205
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
unspecified
unspecified
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-12-16 14:01 UTC by OSIDB Bzimport
Modified: 2026-06-29 18:10 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2025-12-16 14:01:54 UTC
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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