CVE-2026-74733

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

Description An issue exists in the pca953x GPIO driver where the pca953x irq bus sync unlock() function fails to hold the i2c lock during regmap operations. Because locking is disabled in the regmap configuration to allow the driver to use its own lock, all read and write calls to regmap functions must be protected by the i2c lock. The lack of this lock allows multiple threads to potentially cause incorrect registers to be read or written, specifically affecting the read from the direction register and the write to the interrupt mask register.

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