CVE-2026-64213

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

Description A race condition exists in the lm90 alert() function, which executes in the smbus alert context. The function calls lm90 update confreg() to disable the hardware alert line without acquiring the hwmon lock. Simultaneously, sysfs write operations, such as lm90 write convrate(), hold the hwmon lock to modify and then restore data->config. If an alert interrupt occurs during a sysfs write, the sysfs process may overwrite the modifications made by the alert handler to data->config and the hardware register. This can unintentionally re-enable the hardware alert line while an alarm is active, leading to an interrupt storm, which is a state where the system is overwhelmed by a continuous stream of interrupts.

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