CVE-2023-38409

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 6.2.12

Description The issue is related to the use of memory after it has been freed in the set con2fb map() function in the Linux kernel. This can lead to a denial of service. The problem arises because an assignment occurs only for the first vc, causing the fbcon registered fb and fbcon display arrays to become desynchronized in fbcon mode deleted, as the con2fb map points to the old fb info.

Recommendations For Linux kernel versions prior to 6.2.12, update to version 6.2.12 or later to resolve the issue. As a temporary workaround, consider restricting access to the set con2fb map() function in the fbcon.c module until a patch is available.