Bug 2424867 (CVE-2025-68345)

Summary: CVE-2025-68345 kernel: Linux kernel ALSA: Denial of Service due to NULL pointer dereference
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
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Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in the Linux kernel's Advanced Linux Sound Architecture (ALSA) component. This vulnerability, a NULL pointer dereference, occurs in the cs35l41_hda_read_acpi() function when a null value is not properly handled. A local attacker could exploit this to trigger a system crash, resulting in a Denial of Service (DoS).
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Description OSIDB Bzimport 2025-12-24 11:02:16 UTC 
In the Linux kernel, the following vulnerability has been resolved:

ALSA: hda: cs35l41: Fix NULL pointer dereference in cs35l41_hda_read_acpi()

The acpi_get_first_physical_node() function can return NULL, in which
case the get_device() function also returns NULL, but this value is
then dereferenced without checking,so add a check to prevent a crash.

Found by Linux Verification Center (linuxtesting.org) with SVACE.
Comment 1 Alexander B 2025-12-25 16:46:12 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025122452-CVE-2025-68345-eea0@gregkh/T