CVE-2020-8428

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.5

Description The issue is related to a use-after-free in the fs/namei.c file of the Linux kernel. This can be exploited by local users to cause a denial of service or possibly obtain sensitive information from kernel memory. One potential attack vector involves an open system call for a UNIX domain socket, specifically when the socket is being moved to a new parent directory and its old parent directory is being removed.

Recommendations For Linux kernel versions prior to 5.5, update to version 5.5 or later to resolve the issue. As a temporary workaround, consider restricting access to UNIX domain sockets to minimize the risk of exploitation. Avoid using the open system call for UNIX domain sockets when moving them to new parent directories, especially if the old parent directory is being removed, until the issue is resolved.