Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 3.15, < 4.4.274 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2Patch
- https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84aPatch
- https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6Patch
- https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7eaPatch
- https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6Patch
- https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bbPatch
- https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130Patch
- https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8Patch
- https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2Patch
- https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84aPatch
- https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6Patch
- https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7eaPatch
- https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6Patch
- https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bbPatch
- https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130Patch
FAQ
What is CVE-2021-47235?
CVE-2021-47235 is a vulnerability with a CVSS score of 7.8 (HIGH). 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_p...
How severe is CVE-2021-47235?
CVE-2021-47235 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47235?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.