Linux · Linux Kernel · CVE-2021-47387
**Name of the Vulnerable Software and Affected Versions**
Linux kernel versions prior to 5.14.0-rc1-next-20210715-yocto-standard+ #507
**Description**
A vulnerability in the Linux kernel has been resolved. The issue is related to the `cpufreq` subsystem, specifically the `schedutil` governor. The `struct sugov tunables` is protected by a `kobject`, and attempting to free it directly would result in a call trace. To fix this, the original `sugov tunables free()` function has been split into two functions: `sugov clear global tunables()` to clear the global tunables and a new `sugov tunables free()` function used as `kobj type::release` to release the `sugov tunables` safely.
**Recommendations**
To resolve the issue, update the Linux kernel to a version that includes the fix for this vulnerability. Specifically, update to a version later than 5.14.0-rc1-next-20210715-yocto-standard+ #507.
Note: The provided information does not specify the exact version that includes the fix, so it is recommended to update to the latest available version of the Linux kernel.