Linux · Linux Kernel · CVE-2021-47237
**Name of the Vulnerable Software and Affected Versions**
Linux kernel (affected versions not specified)
**Description**
A memory leak vulnerability has been resolved in the Linux kernel. The issue was caused by a missing `free netdev()` call in the `mkiss close()` function, which led to a memory leak when the `mkiss open()` function allocated and registered a netdevice, but the `mkiss close()` function only unregistered it without freeing the memory. The vulnerability was identified by a syzbot instance, which detected the memory leak and provided a fail log with details of the unreferenced objects and backtraces.
**Recommendations**
At the moment, there is no information about a newer version that contains a fix for this vulnerability.