CVE-2026-74463

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description An AB/BA deadlock exists between the Common Clock Framework (CCF) and the I2C adapter lock. This occurs when an I2C-controlled clock generator client is registered or modified under the CCF. The issue arises when the CCF acquires its global prepare lock mutex and calls i2c transfer(), which then waits for the I2C adapter lock. Simultaneously, another transfer on the same bus may hold the I2C adapter lock and call the jz4780 i2c set speed() function, which in turn calls clk get rate() and attempts to acquire the prepare lock, resulting in a circular dependency that freezes the system.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.