CVE-2025-21912

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to the fixed version

Description The issue is related to the use of spinlocks in the Linux kernel, specifically in the gpio rcar config interrupt input mode function. The problem arises when spinlock debugging is enabled, resulting in spurious messages about invalid context. The estimated number of potentially affected devices worldwide is not provided. There is no information about real-world incidents where this issue was exploited.

Technical details about exploitation include the use of raw spinlock to protect register access. The gpio rcar config interrupt input mode function is involved, and the issue is related to the serialization of register access.

Recommendations To resolve the issue, update to a version of the Linux kernel that includes the fix for this problem. As a temporary workaround, consider disabling the gpio rcar config interrupt input mode function until a patch is available.