7.8
CWE
416
Advisory Published
Updated

CVE-2023-4015: Use After Free

First published: Thu Aug 03 2023(Updated: )

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used. We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.

Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<=6.5
Debian Debian Linux=12.0
Linux Linux kernel>=5.9<5.10.190
Linux Linux kernel>=5.11<5.15.124
Linux Linux kernel>=5.16<6.1.43
Linux Linux kernel>=6.2<6.4.8
redhat/Kernel<6.5
6.5
ubuntu/linux<5.15.0-82.91
5.15.0-82.91
ubuntu/linux<6.2.0-31.31
6.2.0-31.31
ubuntu/linux<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-allwinner<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-allwinner-5.19<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws<5.15.0-1043.48
5.15.0-1043.48
ubuntu/linux-aws<6.2.0-1010.10
6.2.0-1010.10
ubuntu/linux-aws<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-5.0<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-5.15<5.15.0-1043.48~20.04.1
5.15.0-1043.48~20.04.1
ubuntu/linux-aws-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-5.19<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-6.2<6.2.0-1010.10~22.04.1
6.2.0-1010.10~22.04.1
ubuntu/linux-aws-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-fips<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-aws-hwe<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure<5.15.0-1045.52
5.15.0-1045.52
ubuntu/linux-azure<6.2.0-1010.10
6.2.0-1010.10
ubuntu/linux-azure<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-4.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-5.15<5.15.0-1045.52~20.04.1
5.15.0-1045.52~20.04.1
ubuntu/linux-azure-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-edge<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-fde<5.15.0-1045.52.1
5.15.0-1045.52.1
ubuntu/linux-azure-fde<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-fde-5.15<5.15.0-1046.53~20.04.1.1
5.15.0-1046.53~20.04.1.1
ubuntu/linux-azure-fde-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-fde-5.19<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-fde-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-azure-fips<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-bluefield<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-dell300x<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-fips<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp<5.15.0-1040.48
5.15.0-1040.48
ubuntu/linux-gcp<6.2.0-1012.12
6.2.0-1012.12
ubuntu/linux-gcp<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp-4.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp-5.15<5.15.0-1040.48~20.04.1
5.15.0-1040.48~20.04.1
ubuntu/linux-gcp-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp-5.19<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gcp-fips<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gke<5.15.0-1040.45
5.15.0-1040.45
ubuntu/linux-gke<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gke-4.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gke-5.0<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gke-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gke-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gkeop<5.15.0-1026.31
5.15.0-1026.31
ubuntu/linux-gkeop<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gkeop-5.15<5.15.0-1026.31~20.04.1
5.15.0-1026.31~20.04.1
ubuntu/linux-gkeop-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-gkeop-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-hwe<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-hwe-5.15<5.15.0-82.91~20.04.1
5.15.0-82.91~20.04.1
ubuntu/linux-hwe-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-hwe-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-hwe-6.2<6.2.0-31.31~22.04.1
6.2.0-31.31~22.04.1
ubuntu/linux-hwe-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-hwe-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-hwe-edge<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-ibm<5.15.0-1036.39
5.15.0-1036.39
ubuntu/linux-ibm<6.2.0-1008.8
6.2.0-1008.8
ubuntu/linux-ibm<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-ibm-5.15<5.15.0-1036.39~20.04.1
5.15.0-1036.39~20.04.1
ubuntu/linux-ibm-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-ibm-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-intel<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-intel-5.13<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-intel-iotg<5.15.0-1038.43
5.15.0-1038.43
ubuntu/linux-intel-iotg<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-intel-iotg-5.15<5.15.0-1038.43~20.04.1
5.15.0-1038.43~20.04.1
ubuntu/linux-intel-iotg-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-iot<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-kvm<5.15.0-1040.45
5.15.0-1040.45
ubuntu/linux-kvm<6.2.0-1011.11
6.2.0-1011.11
ubuntu/linux-kvm<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-laptop<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-lowlatency<5.15.0-82.91
5.15.0-82.91
ubuntu/linux-lowlatency<6.2.0-1011.11
6.2.0-1011.11
ubuntu/linux-lowlatency<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-82.91~20.04.1
5.15.0-82.91~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-lowlatency-hwe-5.19<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-lowlatency-hwe-6.2<6.2.0-1011.11~22.04.1
6.2.0-1011.11~22.04.1
ubuntu/linux-lowlatency-hwe-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-lowlatency-hwe-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-lts-xenial<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-nvidia<5.15.0-1031.31
5.15.0-1031.31
ubuntu/linux-nvidia<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-nvidia-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-nvidia-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-5.10<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-5.14<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-5.17<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-5.6<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-6.0<6.0.0-1021.21
6.0.0-1021.21
ubuntu/linux-oem-6.0<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-6.1<6.1.0-1020.20
6.1.0-1020.20
ubuntu/linux-oem-6.1<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-6.8<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oem-osp1<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oracle<5.15.0-1041.47
5.15.0-1041.47
ubuntu/linux-oracle<6.2.0-1010.10
6.2.0-1010.10
ubuntu/linux-oracle<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oracle-5.0<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oracle-5.13<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oracle-5.15<5.15.0-1041.47~20.04.1
5.15.0-1041.47~20.04.1
ubuntu/linux-oracle-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oracle-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-oracle-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-raspi<5.15.0-1036.39
5.15.0-1036.39
ubuntu/linux-raspi<6.2.0-1011.13
6.2.0-1011.13
ubuntu/linux-raspi<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-raspi-5.4<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-raspi2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-riscv<6.2.0-31.31.1
6.2.0-31.31.1
ubuntu/linux-riscv<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-riscv-5.15<5.15.0-1039.43~20.04.2
5.15.0-1039.43~20.04.2
ubuntu/linux-riscv-5.15<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-riscv-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-snapdragon<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-starfive<6.2.0-1003.3
6.2.0-1003.3
ubuntu/linux-starfive<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-starfive-5.19<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-starfive-6.2<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-starfive-6.5<6.5~<5.15.124
6.5~
5.15.124
ubuntu/linux-xilinx-zynqmp<6.5~<5.15.124
6.5~
5.15.124
debian/linux
5.10.218-1
6.1.94-1
6.1.90-1
6.9.8-1
6.9.9-1

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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