CVE-2021-4028

A flaw in the Linux kernel’s implementation of RDMA communications manager
listener code allowed an attacker with local access to setup a socket to
listen on a high port allowing for a list element to be used after free.
Given the ability to execute code, a local attacker could leverage this
use-after-free to crash the system or possibly escalate privileges on the
system.

Bugs

• <https://bugzilla.redhat.com/show_bug.cgi?id=2027201&gt;
• <https://bugzilla.suse.com/show_bug.cgi?id=1193167#c0&gt;