The issue is related to an error in resource management in the Linux kernel's route4 change function, which can be exploited to cause a denial of service or execute arbitrary code. The vulnerability is associated with a use-after-free problem in the cls route filter implementation. It allows a local privileged attacker to crash the system, potentially leading to a privilege escalation. The vulnerability can be exploited to elevate privileges by replacing non-privileged credentials with privileged ones.