GSD-2021-1001537 cpufreq: schedutil: Destroy mutex before kobject_put() frees the memory
A use-after-free vulnerability in the Linux kernel cpufreq schedutil governor allows local attackers to cause a denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is GSD-2021-1001537?
GSD-2021-1001537 is an use after free vulnerability in Kernel, published on 19 Oct 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
cpufreq: schedutil: Destroy mutex before kobject_put() frees the memory
This is an automated ID intended to aid in discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven. This ID is fixed in Linux Kernel version v4.14.249 by commit 514643eadfeab8ee11e55981289c720308eb0afd, it was introduced in version v4.14.249 by commit 463c46705f321201090b69c4ad5da0cd2ce614c9. For more details please see the references link.
Which versions are affected by GSD-2021-1001537?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001537?
No fix has been published for GSD-2021-1001537 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is GSD-2021-1001537 being exploited?
There is no known exploitation of GSD-2021-1001537 in the wild and no public exploit code.