Linux kernel before 5.4.2 Improper Privilege Management Vulnerability
In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.c, and net/socket.c.
The information has been provided by Greg Kroah-Hartman
The original article can be found at:https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2
An attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.
Linux kernel before 5.4.2