CVE-2021-47235 : faille élevée linux linux kernel (CVSS 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.

Sévérité

Élevée (CVSS 7.8)

Vecteur CVSS

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Exploitation active

Non signalée par la CISA

Publication

21 mai 2024

Dernière mise à jour

17 juin 2026

• linux linux kernel

• Fiche CVE-2021-47235 sur le NVD (NIST)
• git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e0153…
• git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f…
• git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6e…
• git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e…
• git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e…
• git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d…
• git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8…
• git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f33…