The Linux kernel has a constant stream of fairly severe, exploitable bugs caused by memory safety errors, not to mention non-exploitable bugs that lead to syste

The Linux kernel has a constant stream of fairly severe, exploitable bugs caused by memory safety errors, not to mention non-exploitable bugs that lead to system instability or even data loss. Just a few months back there was a bug that allowed any completely unprivileged user to elevate straight to root using a combination of unprivileged user namespaces and cgroups. Other than RCE or severe data loss, I would say this is one of the most severe forms of bugs possible in a kernel. For some period of time the kernel's basic security features were completely ineffective, and this is possibly one of the most widely used kernels in the world! Severe security related bugs are really common with our OS's and user space software, and we just pretend that it's not a problem. When your kernel can't even offer basic security isolation between users in a reliable manner, when visiting a malformed website with your browser results in arbitrary code execution, or when a malformed message sent to you phone can completely own it, I would say there is a serious problem.