摘要:

In the Linux kernel, the following vulnerability has been resolved:

drm/vmwgfx: Fix stale file descriptors on failed usercopy

A failing usercopy of the fence_rep object will lead to a stale entry in
the file descriptor table as put_unused_fd() won't release it. This
enables userland to refer to a dangling 'file' object through that still
valid file descriptor, leading to all kinds of use-after-free
exploitation scenarios.

Fix this by deferring the call to fd_install() until after the usercopy
has succeeded.

安全等级: Low

公告ID: KylinSec-SA-2024-3188

发布日期: 2024年7月17日

关联CVE: CVE-2022-48771