CVE-2026-64107 Linux CVE debrief

Who should care

Users of the Linux kernel with ASoC codecs pcm512x driver enabled should verify their kernel version and apply patches if available. System administrators and security teams responsible for Linux kernel-based systems should assess the vulnerability's impact on their infrastructure and prioritize patching or mitigation efforts accordingly.

Technical summary

The pcm512x chipset driver defines pcm512x_overclock_xxx_put() as a general mixer kcontrol instead of a DAPM kcontrol. This causes a NULL pointer dereference when accessing struct snd_soc_dapm_context via snd_soc_dapm_kcontrol_to_dapm(). The function should be modified to use snd_soc_component_to_dapm() to resolve the issue. This change ensures proper handling of DAPM context and prevents NULL pointer dereferences, enhancing system stability and security.

Defensive priority

Medium

Recommended defensive actions

• Verify kernel version and apply patches if available
• Use compensating controls such as monitoring and exception tracking
• Inventory checks for affected systems
• Review system logs for indicators of exploitation
• Implement monitoring for abnormal system behavior
• Conduct regular vulnerability assessments

Evidence notes

Evidence is limited; primary official records indicate a null-ptr dereference vulnerability in the Linux kernel ASoC codecs pcm512x driver. Vendor remediation and compensating controls are recommended. Further verification is needed to confirm affected systems and assess potential impact.

Official resources