CVE-2026-64107
Received Received - Intake

Null Pointer Dereference in Linux Kernel PCM512x Driver

Publication date: 2026-07-19

Last updated on: 2026-07-19

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: pcm512x: fix null-ptr dereference in pcm512x_overclock_xxx_put() In the pcm512x chipset driver, pcm512x_overclock_xxx_put() is defined as a general mixer kcontrol instead of a DAPM kcontrol, so struct snd_soc_dapm_context must not be accessed via snd_soc_dapm_kcontrol_to_dapm(). This causes a NULL pointer dereference, so it must be modified to use snd_soc_component_to_dapm().

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Meta Information

Published
2026-07-19
Last Modified
2026-07-19
Generated
2026-07-20
AI Q&A
2026-07-19
EPSS Evaluated
N/A
NVD
CVE-2026-64107
EUVD
EUVD-2026-45792

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux_kernel linux_kernel *

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a null-pointer dereference vulnerability in the Linux kernel's ASoC codec driver for the pcm512x chipset. The issue occurs in the pcm512x_overclock_xxx_put() function, which is incorrectly defined as a mixer kcontrol instead of a DAPM kcontrol. This leads to an attempt to access struct snd_soc_dapm_context via snd_soc_dapm_kcontrol_to_dapm(), causing a NULL pointer dereference.

Detection Guidance

This vulnerability is specific to the Linux kernel's ASoC pcm512x driver and requires kernel-level inspection. Detection involves checking kernel logs for NULL pointer dereference errors related to pcm512x_overclock_xxx_put(). Use commands like dmesg | grep pcm512x or journalctl -k | grep pcm512x to identify crashes or errors.

Impact Analysis

This vulnerability could cause a system crash or instability if the affected driver is used. Systems running Linux with the pcm512x codec driver may experience kernel panics or unexpected behavior when interacting with audio controls.

Compliance Impact

This vulnerability is a null-pointer dereference in the Linux kernel's ASoC codec driver for pcm512x. It does not directly impact compliance with standards like GDPR or HIPAA, as those focus on data protection and privacy rather than kernel-level driver issues.

Mitigation Strategies

Apply the latest Linux kernel update that includes the fix for this vulnerability. If immediate patching is not possible, disable the pcm512x driver module temporarily using rmmod pcm512x or blacklist the module in /etc/modprobe.d/.

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