CWE
229
EPSS
0.042%
Advisory Published
CVE Published
Updated

CVE-2024-0607: Kernel: nf_tables: pointer math issue in nft_byteorder_eval()

First published: Tue Jan 16 2024(Updated: )

A flaw was found in the Netfilter module in the Linux kernel. The problem is in the nft_byteorder_eval() function where the code is iterating through a loop and writing to dst[0], dst[1], dst[2] and so on. On each iteration 8 bytes get written, but dst[] is an array of u32 so each element only has space for 4 bytes. That means that every iteration overwrites part of the previous element. Upstream commit: <a href="https://github.com/torvalds/linux/commit/c301f0981fdd3fd1ffac6836b423c4d7a8e0eb63">https://github.com/torvalds/linux/commit/c301f0981fdd3fd1ffac6836b423c4d7a8e0eb63</a>

Credit: secalert@redhat.com secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.7
6.7
Linux Kernel<6.7
Linux Kernel=6.7-rc1
Red Hat Fedora=39
Red Hat Enterprise Linux=8.0
Red Hat Enterprise Linux=9.0
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1

Remedy

If not needed, disable the ability for unprivileged users to create namespaces. To do this temporarily, do: sudo sysctl -w kernel.unprivileged_userns_clone=0 To disable across reboots, do: echo kernel.unprivileged_userns_clone=0 | \ sudo tee /etc/sysctl.d/99-disable-unpriv-userns.conf

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Frequently Asked Questions

  • What is the severity of CVE-2024-0607?

    CVE-2024-0607 has a critical severity rating due to its potential to cause kernel crashes or data corruption.

  • How do I fix CVE-2024-0607?

    To fix CVE-2024-0607, update the kernel to version 6.7 or apply the specific patches provided by your distribution.

  • What versions of the Linux kernel are affected by CVE-2024-0607?

    CVE-2024-0607 affects Linux kernel versions prior to 6.7, including certain versions of Debian and Red Hat Enterprise Linux.

  • Is CVE-2024-0607 related to a specific Linux distribution?

    Yes, CVE-2024-0607 impacts multiple distributions such as Red Hat Enterprise Linux, Debian, and Fedora.

  • What components of the Linux kernel are impacted by CVE-2024-0607?

    CVE-2024-0607 specifically affects the Netfilter module due to a flaw in the nft_byteorder_eval() function.

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