description: The root cause of this vulnerability is that the ioctl$DRM_IOCTL_MODE_DESTROY_DUMB can decrease refcount of *drm_vgem_gem_object *(created in *vgem_gem_dumb_create*) concurrently, and *vgem_gem_dumb_create *will access the freed drm_vgem_gem_object.
problem types: CWE-416
affected:
{
product: kernel
vendor: n/a
versions:
status: affected, version: kernel 5.x
}