CVE-2021-47239

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a possible use-after-free in the smsc75xx bind function. The commit 46a8b29c6306 ("net: usb: fix memory leak in smsc75xx bind") fails to clean up the work scheduled in smsc75xx reset->smsc75xx set multicast, which leads to use-after-free if the work is scheduled to start after the deallocation. In addition, this patch also removes a dangling pointer - dev->data[0]. The patch calls cancel work sync to cancel the scheduled work and set the dangling pointer to NULL.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.