Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before 56bc91ee78babe9578585a2bc137abc4b3115ff3; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before 4b9118e93d2499bb2808ef3742fa0ce06f4f8117; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before 019ea28629720c220daedf38107c8787f330dc05; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before da39ee627fd82b52068d4d5f115749a8b7d271f9; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before 427d048e4f6acbfa01b5a8062449fe0ee8987c0d; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before 3bf9d023d2329a0e5379f2fd09d06ef09729cd9d; affected 4ebe36c94aed95de71a8ce6a6762226d31c938ee before 6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e; affected e977b1477a6725868302957e6b5c330220391797; affected 5.1.6 before 5.2 |
| Linux / Linux | affected 5.2; unaffected 0 before 5.2; unaffected 5.10.253 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.168 through 6.1.*; unaffected 6.6.134 through 6.6.*; unaffected 6.12.81 through 6.12.*; unaffected 6.18.22 through 6.18.*; unaffected 6.19.12 through 6.19.*; unaffected 7.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/56bc91ee78babe9578585a2bc137abc4b3115ff3
- https://git.kernel.org/stable/c/4b9118e93d2499bb2808ef3742fa0ce06f4f8117
- https://git.kernel.org/stable/c/019ea28629720c220daedf38107c8787f330dc05
- https://git.kernel.org/stable/c/da39ee627fd82b52068d4d5f115749a8b7d271f9
- https://git.kernel.org/stable/c/427d048e4f6acbfa01b5a8062449fe0ee8987c0d
- https://git.kernel.org/stable/c/d2703b4f8fb7cc6f0dfdb2dc2359cc46189e7357
- https://git.kernel.org/stable/c/3bf9d023d2329a0e5379f2fd09d06ef09729cd9d
- https://git.kernel.org/stable/c/6dcf9d0064ce2f3e3dfe5755f98b93abe6a98e1e