Tracker / CVE-2021-47235
CVE-2021-47235
High 7.8
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 and versions
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 3.15 → 4.4.274 |
| linux | linux_kernel · 4.10 → 4.14.238 |
| linux | linux_kernel · 4.15 → 4.19.196 |
| linux | linux_kernel · 4.20 → 5.4.128 |
| linux | linux_kernel · 4.5 → 4.9.274 |
| linux | linux_kernel · 5.11 → 5.12.13 |
| linux | linux_kernel · 5.5 → 5.10.46 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.