GSD-2021-1001657 cpufreq: schedutil: Use kobject release() method to free sugov_tunables
A use-after-free vulnerability in the Linux kernel cpufreq schedutil governor allows local attackers to cause denial of service or potentially escalate privileges.
- 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-2021-1001657?
GSD-2021-1001657 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: Use kobject release() method to free sugov_tunables
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 v5.10.71 by commit a7d4fc84404d45d72f4490417e8cc3efa4af93f1, it was introduced in version v4.7 by commit 9bdcb44e391da5c41b98573bf0305a0e0b1c9569. For more details please see the references link.
Which versions are affected by GSD-2021-1001657?
1 open source package ship an affected version, including Kernel.
| Package | Affected | Fixed in |
|---|---|---|
Kernel Linux | All versions | None |
How do I fix GSD-2021-1001657?
No fix has been published for GSD-2021-1001657 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-2021-1001657 being exploited?
There is no known exploitation of GSD-2021-1001657 in the wild and no public exploit code.