CVE-2026-53344

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

Description A NULL pointer dereference occurs during the probe process in the pinctrl mcp23s08 driver. This happens because regmap initialization triggers the regcache maple populate() function, which attempts an SPI read to populate the cache. This SPI read requires the mcp->dev and mcp->addr variables to be initialized; if they are not set before the mcp23s08 spi regmap init() call, the system crashes.

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