Description
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().
Metrics
CVSS 3.1 7.8/10
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 56bc91ee78babe9578585a2bc137abc4b3115ff3; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 4b9118e93d2499bb2808ef3742fa0ce06f4f8117; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 019ea28629720c220daedf38107c8787f330dc05; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < da39ee627fd82b52068d4d5f115749a8b7d271f9; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 427d048e4f6acbfa01b5a8062449fe0ee8987c0d; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d; >= 4ebe36c94aed95de71a8ce6a6762226d31c938ee, < 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e; e977b1477a6725868302957e6b5c330220391797; >= 5.1.6, < 5.2 |
| Linux | Linux | 5.2 |
References
- https://git.kernel.org/stable/c/019ea28629720c220daedf38107c8787f330dc05Patch
- https://git.kernel.org/stable/c/3bf9d023d2329a0e5379f2fd09d06ef09729cd9dPatch
- https://git.kernel.org/stable/c/427d048e4f6acbfa01b5a8062449fe0ee8987c0dPatch
- https://git.kernel.org/stable/c/4b9118e93d2499bb2808ef3742fa0ce06f4f8117
- https://git.kernel.org/stable/c/56bc91ee78babe9578585a2bc137abc4b3115ff3Patch
- https://git.kernel.org/stable/c/6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1ePatch
- https://git.kernel.org/stable/c/d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357Patch
- https://git.kernel.org/stable/c/da39ee627fd82b52068d4d5f115749a8b7d271f9Patch
Timeline
- Published
- May 8, 2026
- Last modified
- Nov 11, 2026
- NVD status
- Modified