Konstantin Belousov

The issue is related to the sys amd64 IRET Handler in the kernel, which is associated with insufficient access control. This can be exploited by a local attacker to gain privileges or cause a denial of service, resulting in a kernel panic.

The issue concerns the `vm map lookup` function in the kernel's mmap implementation, which fails to properly determine whether a task should have write access to a memory location. This allows local users to bypass filesystem write permissions and gain privileges by leveraging read permissions through a crafted application that makes `mmap` and `ptrace` system calls.