There are heaps and heaps of security issues in Linux (the kernel). Simply mounting a file system can result in your system being compromised if the file syste

There are heaps and heaps of security issues in Linux (the kernel). Simply mounting a file system can result in your system being compromised if the file system was maliciously crafted. This isn't something that is actively protected against. Another issue I can think of OTTOMH, is unprivileged user namespaces causing lots of security issues to surface because certain parts of the kernel's code was written with the assumption that only "root" would be able to invoke it, so if you already were "root" securing this didn't matter. There are many, many more issues similar to these, too many for me to write about, and probably many that are way beyond my comprehension. I don't think it's wrong to say that Linux has not been very secure.