CVE-2021-47235
net: ethernet: fix potential use-after-free in ec_bhf_remove
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
Version range not reported
- Linux Linux
3.15
References 8
git.kernel.org
- stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8
- stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6
- stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb
- stable/c/0260916843cc74f3906acf8b6f256693e01530a2
- stable/c/19f88ca68ccf8771276a606765239b167654f84a
- stable/c/95deeb29d831e2fae608439e243e7a520611e7ea
- stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130
- stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6