NetSight
IP …
high7.8

CVE-2021-47235

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: fix potential use-after-free in ec_bhf_remove static void ec_bhf_remove(stru…

Impact

In the Linux kernel, the following vulnerability has been resolved: net: ethernet: fix potential use-after-free in ec_bhf_remove static void ec_bhf_remove(struct pci_dev *dev) { ... struct ec_bhf_priv *priv = netdev_priv(net_dev); unregister_netdev(net_dev); free_netdev(net_dev); pci_iounmap(dev, priv->dma_io); pci_iounmap(dev, priv->io); ... } priv is netdev private data, but it is used after free_netdev(). It can cause use-after-free when accessing priv pointer. So, fix it by moving free_netdev() after pci_iounmap() calls.

Affected products

VendorProductAffected versions
LinuxLinux Kernel
from 3.15 before 4.4.274
from 4.5 before 4.9.274
from 4.10 before 4.14.238
from 4.15 before 4.19.196
from 4.20 before 5.4.128
from 5.5 before 5.10.46

Weakness classification

CWE-416

References