Bug 2422663 (CVE-2025-68205)

Summary: CVE-2025-68205 kernel: ALSA: hda/hdmi: Fix breakage at probing nvhdmi-mcp driver
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
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Hardware: All   
OS: Linux   
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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.
Comment 1 Alexander B 2025-12-17 04:54:52 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025121632-CVE-2025-68205-6672@gregkh/T