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 Software | Affected Version | How to fix |
---|---|---|
Linux Linux kernel | <6.7 | |
Linux Linux kernel | =6.7-rc1 | |
Fedoraproject Fedora | =39 | |
Redhat Enterprise Linux | =8.0 | |
Redhat Enterprise Linux | =9.0 | |
redhat/kernel | <6.7 | 6.7 |
ubuntu/linux | <5.4.0-176.196 | 5.4.0-176.196 |
ubuntu/linux | <5.15.0-100.110 | 5.15.0-100.110 |
ubuntu/linux | <6.5.0-25.25 | 6.5.0-25.25 |
ubuntu/linux | <6.7~ | 6.7~ |
ubuntu/linux-aws | <5.4.0-1122.132 | 5.4.0-1122.132 |
ubuntu/linux-aws | <5.15.0-1056.61 | 5.15.0-1056.61 |
ubuntu/linux-aws | <6.5.0-1015.15 | 6.5.0-1015.15 |
ubuntu/linux-aws | <6.7~ | 6.7~ |
ubuntu/linux-aws-5.15 | <5.15.0-1056.61~20.04.1 | 5.15.0-1056.61~20.04.1 |
ubuntu/linux-aws-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-aws-5.4 | <5.4.0-1122.132~18.04.1 | 5.4.0-1122.132~18.04.1 |
ubuntu/linux-aws-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-aws-6.2 | <6.7~ | 6.7~ |
ubuntu/linux-aws-6.5 | <6.5.0-1015.15~22.04.1 | 6.5.0-1015.15~22.04.1 |
ubuntu/linux-aws-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-aws-hwe | <6.7~ | 6.7~ |
ubuntu/linux-azure | <5.4.0-1127.134 | 5.4.0-1127.134 |
ubuntu/linux-azure | <5.15.0-1058.66 | 5.15.0-1058.66 |
ubuntu/linux-azure | <6.5.0-1016.16 | 6.5.0-1016.16 |
ubuntu/linux-azure | <6.7~ | 6.7~ |
ubuntu/linux-azure-4.15 | <6.7~ | 6.7~ |
ubuntu/linux-azure-5.15 | <5.15.0-1058.66~20.04.2 | 5.15.0-1058.66~20.04.2 |
ubuntu/linux-azure-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-azure-5.4 | <5.4.0-1127.134~18.04.1 | 5.4.0-1127.134~18.04.1 |
ubuntu/linux-azure-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-azure-6.2 | <6.7~ | 6.7~ |
ubuntu/linux-azure-6.5 | <6.5.0-1016.16~22.04.1 | 6.5.0-1016.16~22.04.1 |
ubuntu/linux-azure-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-azure-fde | <5.15.0-1058.66.1 | 5.15.0-1058.66.1 |
ubuntu/linux-azure-fde | <6.7~ | 6.7~ |
ubuntu/linux-azure-fde-5.15 | <5.15.0-1058.66~20.04.2.1 | 5.15.0-1058.66~20.04.2.1 |
ubuntu/linux-azure-fde-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-azure-fde-6.2 | <6.7~ | 6.7~ |
ubuntu/linux-bluefield | <5.4.0-1082.89 | 5.4.0-1082.89 |
ubuntu/linux-bluefield | <6.7~ | 6.7~ |
ubuntu/linux-fips | <6.7~ | 6.7~ |
ubuntu/linux-gcp | <5.4.0-1126.135 | 5.4.0-1126.135 |
ubuntu/linux-gcp | <5.15.0-1053.61 | 5.15.0-1053.61 |
ubuntu/linux-gcp | <6.5.0-1015.15 | 6.5.0-1015.15 |
ubuntu/linux-gcp | <6.7~ | 6.7~ |
ubuntu/linux-gcp-4.15 | <6.7~ | 6.7~ |
ubuntu/linux-gcp-5.15 | <5.15.0-1053.61~20.04.1 | 5.15.0-1053.61~20.04.1 |
ubuntu/linux-gcp-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-gcp-5.19 | <6.7~ | 6.7~ |
ubuntu/linux-gcp-5.4 | <5.4.0-1126.135~18.04.1 | 5.4.0-1126.135~18.04.1 |
ubuntu/linux-gcp-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-gcp-6.5 | <6.5.0-1015.15~22.04.1 | 6.5.0-1015.15~22.04.1 |
ubuntu/linux-gcp-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-gke | <5.15.0-1052.57 | 5.15.0-1052.57 |
ubuntu/linux-gke | <6.7~ | 6.7~ |
ubuntu/linux-gkeop | <5.4.0-1089.93 | 5.4.0-1089.93 |
ubuntu/linux-gkeop | <5.15.0-1038.44 | 5.15.0-1038.44 |
ubuntu/linux-gkeop | <6.7~ | 6.7~ |
ubuntu/linux-gkeop-5.15 | <5.15.0-1038.44~20.04.1 | 5.15.0-1038.44~20.04.1 |
ubuntu/linux-gkeop-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-hwe | <6.7~ | 6.7~ |
ubuntu/linux-hwe-5.15 | <5.15.0-100.110~20.04.1 | 5.15.0-100.110~20.04.1 |
ubuntu/linux-hwe-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-hwe-5.4 | <5.4.0-175.195~18.04.1 | 5.4.0-175.195~18.04.1 |
ubuntu/linux-hwe-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-hwe-6.5 | <6.5.0-25.25~22.04.1 | 6.5.0-25.25~22.04.1 |
ubuntu/linux-hwe-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-ibm | <5.4.0-1069.74 | 5.4.0-1069.74 |
ubuntu/linux-ibm | <5.15.0-1048.51 | 5.15.0-1048.51 |
ubuntu/linux-ibm | <6.7~ | 6.7~ |
ubuntu/linux-ibm-5.15 | <5.15.0-1048.51~20.04.1 | 5.15.0-1048.51~20.04.1 |
ubuntu/linux-ibm-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-ibm-5.4 | <5.4.0-1069.74~18.04.1 | 5.4.0-1069.74~18.04.1 |
ubuntu/linux-ibm-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-intel-iotg | <5.15.0-1050.56 | 5.15.0-1050.56 |
ubuntu/linux-intel-iotg | <6.7~ | 6.7~ |
ubuntu/linux-intel-iotg-5.15 | <5.15.0-1050.56~20.04.1 | 5.15.0-1050.56~20.04.1 |
ubuntu/linux-intel-iotg-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-iot | <5.4.0-1034.35 | 5.4.0-1034.35 |
ubuntu/linux-iot | <6.7~ | 6.7~ |
ubuntu/linux-kvm | <5.4.0-1110.117 | 5.4.0-1110.117 |
ubuntu/linux-kvm | <5.15.0-1052.57 | 5.15.0-1052.57 |
ubuntu/linux-kvm | <6.7~ | 6.7~ |
ubuntu/linux-laptop | <6.5.0-1011.14 | 6.5.0-1011.14 |
ubuntu/linux-laptop | <6.7~ | 6.7~ |
ubuntu/linux-lowlatency | <5.15.0-100.110 | 5.15.0-100.110 |
ubuntu/linux-lowlatency | <6.5.0-25.25.1 | 6.5.0-25.25.1 |
ubuntu/linux-lowlatency | <6.7~ | 6.7~ |
ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-100.110~20.04.1 | 5.15.0-100.110~20.04.1 |
ubuntu/linux-lowlatency-hwe-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-lowlatency-hwe-6.2 | <6.7~ | 6.7~ |
ubuntu/linux-lts-xenial | <6.7~ | 6.7~ |
ubuntu/linux-nvidia | <5.15.0-1046.46 | 5.15.0-1046.46 |
ubuntu/linux-nvidia | <6.7~ | 6.7~ |
ubuntu/linux-nvidia-6.2 | <6.7~ | 6.7~ |
ubuntu/linux-oem-6.1 | <6.1.0-1033.33 | 6.1.0-1033.33 |
ubuntu/linux-oem-6.1 | <6.7~ | 6.7~ |
ubuntu/linux-oem-6.5 | <6.5.0-1016.17 | 6.5.0-1016.17 |
ubuntu/linux-oem-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-oracle | <5.4.0-1121.130 | 5.4.0-1121.130 |
ubuntu/linux-oracle | <5.15.0-1053.59 | 5.15.0-1053.59 |
ubuntu/linux-oracle | <6.5.0-1018.18 | 6.5.0-1018.18 |
ubuntu/linux-oracle | <6.7~ | 6.7~ |
ubuntu/linux-oracle-5.15 | <5.15.0-1053.59~20.04.1 | 5.15.0-1053.59~20.04.1 |
ubuntu/linux-oracle-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-oracle-5.4 | <5.4.0-1121.130~18.04.1 | 5.4.0-1121.130~18.04.1 |
ubuntu/linux-oracle-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-raspi | <5.4.0-1106.118 | 5.4.0-1106.118 |
ubuntu/linux-raspi | <5.15.0-1048.51 | 5.15.0-1048.51 |
ubuntu/linux-raspi | <6.5.0-1012.15 | 6.5.0-1012.15 |
ubuntu/linux-raspi | <6.7~ | 6.7~ |
ubuntu/linux-raspi-5.4 | <5.4.0-1106.118~18.04.1 | 5.4.0-1106.118~18.04.1 |
ubuntu/linux-raspi-5.4 | <6.7~ | 6.7~ |
ubuntu/linux-riscv | <6.5.0-25.25.1 | 6.5.0-25.25.1 |
ubuntu/linux-riscv | <6.7~ | 6.7~ |
ubuntu/linux-riscv-5.15 | <5.15.0-1051.55~20.04.1 | 5.15.0-1051.55~20.04.1 |
ubuntu/linux-riscv-5.15 | <6.7~ | 6.7~ |
ubuntu/linux-riscv-6.5 | <6.5.0-25.25.1~22.04.1 | 6.5.0-25.25.1~22.04.1 |
ubuntu/linux-riscv-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-starfive | <6.5.0-1009.10 | 6.5.0-1009.10 |
ubuntu/linux-starfive | <6.7~ | 6.7~ |
ubuntu/linux-starfive-6.5 | <6.5.0-1009.10~22.04.1 | 6.5.0-1009.10~22.04.1 |
ubuntu/linux-starfive-6.5 | <6.7~ | 6.7~ |
ubuntu/linux-xilinx-zynqmp | <5.4.0-1041.45 | 5.4.0-1041.45 |
ubuntu/linux-xilinx-zynqmp | <6.7~ | 6.7~ |
debian/linux | <=4.19.249-2<=4.19.304-1<=5.10.209-2<=5.10.205-2 | 6.1.76-1 6.1.85-1 6.6.15-2 6.7.12-1 |
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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