CVE-2026-43328

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().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < 56bc91ee78babe9578585a2bc137abc4b3115ff3affected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < 4b9118e93d2499bb2808ef3742fa0ce06f4f8117affected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < 019ea28629720c220daedf38107c8787f330dc05affected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < da39ee627fd82b52068d4d5f115749a8b7d271f9affected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < 427d048e4f6acbfa01b5a8062449fe0ee8987c0daffected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357affected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < 3bf9d023d2329a0e5379f2fd09d06ef09729cd9daffected
LinuxLinux4ebe36c94aed95de71a8ce6a6762226d31c938ee < 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1eaffected
LinuxLinuxe977b1477a6725868302957e6b5c330220391797affected
LinuxLinux5.1.6 < 5.2affected
LinuxLinux5.2affected
LinuxLinux0 < 5.2unaffected
LinuxLinux5.10.253 <= 5.10.*unaffected
LinuxLinux5.15.209 <= 5.15.*unaffected
LinuxLinux6.1.168 <= 6.1.*unaffected
LinuxLinux6.6.134 <= 6.6.*unaffected
LinuxLinux6.12.81 <= 6.12.*unaffected
LinuxLinux6.18.22 <= 6.18.*unaffected
LinuxLinux6.19.12 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References