NetSight
IP …
high7.8

CVE-2022-48771

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_r…

Impact

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.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 4.14 before 4.14.264
from 4.15 before 4.19.227
from 4.20 before 5.4.175
from 5.5 before 5.10.95
from 5.11 before 5.15.18
from 5.16 before 5.16.4

Weakness classification

CWE-416

References