CVE-2026-46333

Popis

In the Linux kernel, the following vulnerability has been resolved: ptrace: slightly saner -get_dumpable()- logic The -dumpability- of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don-t have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer. But we have one odd special case: ptrace_may_access() uses -dumpable- to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS). Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It-s not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional -drop capabilities- model doesn-t make any difference for this all. Make it all make a *bit* mo...