kernel: possible to use the debugger to write zero into a location of choice

A flaw was found in the kernel/debug/debugcore.c in the Linux kernel in lockdown mode. This flaw allows an attacker with local access to trigger the debugger, bypass lockdown and write anonymously...

The vulnerability in the implementation of the Lockdown Mode mechanism for Linux operating systems allows a hacker to circumvent security restrictions.

The vulnerability in the implementation of the Lockdown Mode for Linux operating system kernels is related to the insecure handling of privileges during the loading of debugging tools KGDB and KDB. Exploiting this vulnerability can allow an attacker to circumvent security restrictions...