kernel: aio: fix use-after-free due to missing POLLFREE handling

A flaw was found in the Linux kernel AIO poll path. It does not handle POLLFREE, so a file can be released while AIO still uses it. A local user can trigger a use-after-free and crash the kernel...

SUSE CVE-2021-47505

In the Linux kernel, the following vulnerability has been resolved: aio: fix use-after-free due to missing POLLFREE handling signalfdpoll and binderpoll are special in that they use a waitqueue whose lifetime is the current task, rather than the struct file as is normally the case. This is okay f...

CVE-2021-47505

In the Linux kernel, the following vulnerability has been resolved: aio: fix use-after-free due to missing POLLFREE handling signalfdpoll and binderpoll are special in that they use a waitqueue whose lifetime is the current task, rather than the struct file as is normally the case. This is okay f...

UBUNTU-CVE-2021-47505

In the Linux kernel, the following vulnerability has been resolved: aio: fix use-after-free due to missing POLLFREE handling signalfdpoll and binderpoll are special in that they use a waitqueue whose lifetime is the current task, rather than the struct file as is normally the case. This is okay f...