cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path

Summary

In the Linux kernel, the following vulnerability has been resolved: cpufreq: governor: fix double free in cpufreq_dbs_governor_init() error path When kobject_init_and_add() fails, cpufreq_dbs_governor_init() calls kobject_put(&dbs_data->attr_set.kobj). The kobject release callback cpufreq_dbs_data_release() calls gov->exit(dbs_data) and kfree(dbs_data), but the current error path then calls gov->exit(dbs_data) and kfree(dbs_data) again, causing a double free. Keep the direct kfree(dbs_data) for the gov->init() failure path, but after kobject_init_and_add() has been called, let kobject_put() handle the cleanup through cpufreq_dbs_data_release().

Timeline

1. May 8, 2026, 1:31 PM UTCCVE published
2. Jun 1, 2026, 4:15 PM UTCRecord last updated

Affected versions

• Linux Linux

  From 5.1.6 · fixed in 5.2

• Linux Linux

  5.2

References 8