发布于3月6日3月6日 Members Ubuntu: (CVE-2021-47235): linux vulnerability Severity 7 CVSS (AV:L/AC:L/Au:S/C:C/I:C/A:C) Published 05/21/2024 Created 11/21/2024 Added 11/19/2024 Modified 02/11/2025 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. Solution(s) ubuntu-upgrade-linux ubuntu-upgrade-linux-aws ubuntu-upgrade-linux-aws-5-4 ubuntu-upgrade-linux-aws-fips ubuntu-upgrade-linux-aws-hwe ubuntu-upgrade-linux-azure ubuntu-upgrade-linux-azure-4-15 ubuntu-upgrade-linux-azure-5-4 ubuntu-upgrade-linux-azure-fips ubuntu-upgrade-linux-bluefield ubuntu-upgrade-linux-fips ubuntu-upgrade-linux-gcp ubuntu-upgrade-linux-gcp-4-15 ubuntu-upgrade-linux-gcp-5-4 ubuntu-upgrade-linux-gcp-fips ubuntu-upgrade-linux-gkeop ubuntu-upgrade-linux-hwe ubuntu-upgrade-linux-hwe-5-4 ubuntu-upgrade-linux-kvm ubuntu-upgrade-linux-oracle ubuntu-upgrade-linux-oracle-5-4 ubuntu-upgrade-linux-raspi ubuntu-upgrade-linux-raspi-5-4 References https://attackerkb.com/topics/cve-2021-47235 CVE - 2021-47235 https://git.kernel.org/linus/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 https://git.kernel.org/stable/c/0260916843cc74f3906acf8b6f256693e01530a2 https://git.kernel.org/stable/c/19f88ca68ccf8771276a606765239b167654f84a https://git.kernel.org/stable/c/1cafc540b7bf1b6a5a77dc000205fe337ef6eba6 https://git.kernel.org/stable/c/95deeb29d831e2fae608439e243e7a520611e7ea https://git.kernel.org/stable/c/9cca0c2d70149160407bda9a9446ce0c29b6e6c6 https://git.kernel.org/stable/c/b1ad283755095a4b9d1431aeb357d7df1a33d3bb https://git.kernel.org/stable/c/d11d79e52ba080ee567cb7d7eb42a5ade60a8130 https://git.kernel.org/stable/c/db2bc3cfd2bc01621014d4f17cdfc74611f339c8 https://www.cve.org/CVERecord?id=CVE-2021-47235 View more
