7.8
CWE
416
Advisory Published
Updated

CVE-2023-3609: Use-after-free in Linux kernel's net/sched: cls_u32 component

First published: Fri Jul 21 2023(Updated: )

A flaw in the Linux Kernel found. A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. Reference: <a href="https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc">https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc</a>

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

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel>=4.14<6.4
Linux Linux kernel=6.4-rc1
Linux Linux kernel=6.4-rc2
Linux Linux kernel=6.4-rc3
Linux Linux kernel=6.4-rc4
Linux Linux kernel=6.4-rc5
Linux Linux kernel=6.4-rc6
Debian Debian Linux=10.0
Debian Debian Linux=11.0
redhat/Kernel<6.4
6.4
IBM QRadar SIEM<=7.5 - 7.5.0 UP8 IF01
ubuntu/linux<5.4.0-159.176
5.4.0-159.176
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-allwinner<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-allwinner-5.19<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws<5.4.0-1108.116
5.4.0-1108.116
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws-5.0<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws-5.19<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws-5.4<5.4.0-1108.116~18.04.1
5.4.0-1108.116~18.04.1
ubuntu/linux-aws-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws-fips<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-aws-hwe<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure<5.4.0-1114.120
5.4.0-1114.120
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-4.15<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-6.2<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-edge<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-fde<5.15.0-1045.52.1
5.15.0-1045.52.1
ubuntu/linux-azure-fde<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-fde-5.19<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-fde-6.2<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-azure-fips<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-bluefield<5.4.0-1070.76
5.4.0-1070.76
ubuntu/linux-bluefield<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-dell300x<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-fips<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gcp<5.4.0-1111.120
5.4.0-1111.120
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gcp-4.15<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gcp-5.19<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gcp-5.4<5.4.0-1111.120~18.04.1
5.4.0-1111.120~18.04.1
ubuntu/linux-gcp-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gcp-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gcp-fips<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gke<5.15.0-1040.45
5.15.0-1040.45
ubuntu/linux-gke<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gke-4.15<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gke-5.0<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gke-5.15<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gke-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gkeop<5.4.0-1075.79
5.4.0-1075.79
ubuntu/linux-gkeop<5.15.0-1026.31
5.15.0-1026.31
ubuntu/linux-gkeop<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-gkeop-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-hwe<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-hwe-5.4<5.4.0-159.176~18.04.1
5.4.0-159.176~18.04.1
ubuntu/linux-hwe-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-hwe-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-hwe-edge<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-ibm<5.4.0-1056.61
5.4.0-1056.61
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-ibm-5.4<5.4.0-1056.61~18.04.1
5.4.0-1056.61~18.04.1
ubuntu/linux-ibm-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-intel<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-intel-5.13<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-intel-iotg<5.15.0-1038.43
5.15.0-1038.43
ubuntu/linux-intel-iotg<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-iot<5.4.0-1021.22
5.4.0-1021.22
ubuntu/linux-iot<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-kvm<5.4.0-1097.103
5.4.0-1097.103
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-laptop<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-lowlatency-hwe-5.19<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-lowlatency-hwe-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-lts-xenial<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-nvidia<5.15.0-1031.31
5.15.0-1031.31
ubuntu/linux-nvidia<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-nvidia-6.2<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-nvidia-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-5.10<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-5.14<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-5.17<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-5.6<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-6.0<6.0.0-1021.21
6.0.0-1021.21
ubuntu/linux-oem-6.0<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-6.1<6.1.0-1019.19
6.1.0-1019.19
ubuntu/linux-oem-6.1<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-6.8<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oem-osp1<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oracle<5.4.0-1107.116
5.4.0-1107.116
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oracle-5.0<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oracle-5.13<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oracle-5.4<5.4.0-1107.116~18.04.1
5.4.0-1107.116~18.04.1
ubuntu/linux-oracle-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-oracle-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-raspi<5.4.0-1092.103
5.4.0-1092.103
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-raspi-5.4<5.4.0-1092.103~18.04.1
5.4.0-1092.103~18.04.1
ubuntu/linux-raspi-5.4<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-raspi2<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-riscv<6.2.0-31.31.1
6.2.0-31.31.1
ubuntu/linux-riscv<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-riscv-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-snapdragon<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-starfive<6.2.0-1003.3
6.2.0-1003.3
ubuntu/linux-starfive<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-starfive-5.19<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-starfive-6.2<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-starfive-6.5<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
ubuntu/linux-xilinx-zynqmp<5.4.0-1028.32
5.4.0-1028.32
ubuntu/linux-xilinx-zynqmp<5.15.0-1025.29
5.15.0-1025.29
ubuntu/linux-xilinx-zynqmp<6.4~<5.4.248<5.15.118
6.4~
5.4.248
5.15.118
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

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Reference Links

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2024 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203