CWE
843 125
Advisory Published
Updated

CVE-2023-23454

First published: Sun Jan 01 2023(Updated: )

cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

Credit: cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
redhat/kernel-rt<0:4.18.0-477.10.1.rt7.274.el8_8
0:4.18.0-477.10.1.rt7.274.el8_8
redhat/kernel<0:4.18.0-477.10.1.el8_8
0:4.18.0-477.10.1.el8_8
Linux Linux kernel>=2.6.12<=6.1.4
Debian Debian Linux=11.0
redhat/kernel<6.2
6.2
ubuntu/linux<5.4.0-144.161
5.4.0-144.161
ubuntu/linux<5.15.0-69.76
5.15.0-69.76
ubuntu/linux<5.19.0-42.43
5.19.0-42.43
ubuntu/linux<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws<5.4.0-1097.105
5.4.0-1097.105
ubuntu/linux-aws<5.15.0-1033.37
5.15.0-1033.37
ubuntu/linux-aws<5.19.0-1025.26
5.19.0-1025.26
ubuntu/linux-aws<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws-5.0<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws-5.15<5.15.0-1033.37~20.04.1
5.15.0-1033.37~20.04.1
ubuntu/linux-aws-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws-5.4<5.4.0-1097.105~18.04.1
5.4.0-1097.105~18.04.1
ubuntu/linux-aws-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws-fips<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-aws-hwe<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure<5.4.0-1104.110
5.4.0-1104.110
ubuntu/linux-azure<5.15.0-1035.42
5.15.0-1035.42
ubuntu/linux-azure<5.19.0-1026.29
5.19.0-1026.29
ubuntu/linux-azure<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-4.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-5.15<5.15.0-1035.42~20.04.1
5.15.0-1035.42~20.04.1
ubuntu/linux-azure-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-5.19<5.19.0-1026.29~22.04.1
5.19.0-1026.29~22.04.1
ubuntu/linux-azure-5.4<5.4.0-1104.110~18.04.1
5.4.0-1104.110~18.04.1
ubuntu/linux-azure-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-edge<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-fde<5.4.0-1104.110
5.4.0-1104.110
ubuntu/linux-azure-fde<5.15.0-1035.42.1
5.15.0-1035.42.1
ubuntu/linux-azure-fde<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-fde-5.15<5.15.0-1035.42~20.04.1.1
5.15.0-1035.42~20.04.1.1
ubuntu/linux-azure-fde-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-azure-fips<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-bluefield<5.4.0-1059.65
5.4.0-1059.65
ubuntu/linux-bluefield<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-dell300x<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-fips<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gcp<5.4.0-1101.110
5.4.0-1101.110
ubuntu/linux-gcp<5.15.0-1031.38
5.15.0-1031.38
ubuntu/linux-gcp<5.19.0-1024.26
5.19.0-1024.26
ubuntu/linux-gcp<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gcp-4.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gcp-5.15<5.15.0-1031.38~20.04.1
5.15.0-1031.38~20.04.1
ubuntu/linux-gcp-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gcp-5.4<5.4.0-1101.110~18.04.1
5.4.0-1101.110~18.04.1
ubuntu/linux-gcp-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gcp-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gcp-fips<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gke<5.4.0-1095.102
5.4.0-1095.102
ubuntu/linux-gke<5.15.0-1030.35
5.15.0-1030.35
ubuntu/linux-gke<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gke-4.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gke-5.0<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gke-5.15<5.15.0-1029.34~20.04.1
5.15.0-1029.34~20.04.1
ubuntu/linux-gke-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gke-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gkeop<5.4.0-1065.69
5.4.0-1065.69
ubuntu/linux-gkeop<5.15.0-1017.22
5.15.0-1017.22
ubuntu/linux-gkeop<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gkeop-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-gkeop-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-hwe<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-hwe-5.15<5.15.0-69.76~20.04.1
5.15.0-69.76~20.04.1
ubuntu/linux-hwe-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-hwe-5.19<5.19.0-42.43~22.04.1
5.19.0-42.43~22.04.1
ubuntu/linux-hwe-5.4<5.4.0-144.161~18.04.1
5.4.0-144.161~18.04.1
ubuntu/linux-hwe-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-hwe-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-hwe-edge<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-ibm<5.4.0-1045.50
5.4.0-1045.50
ubuntu/linux-ibm<5.15.0-1027.30
5.15.0-1027.30
ubuntu/linux-ibm<5.19.0-1022.24
5.19.0-1022.24
ubuntu/linux-ibm<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-ibm-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-ibm-5.4<5.4.0-1045.50~18.04.1
5.4.0-1045.50~18.04.1
ubuntu/linux-ibm-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-intel<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-intel-5.13<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-intel-iotg<5.15.0-1027.32
5.15.0-1027.32
ubuntu/linux-intel-iotg<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-intel-iotg-5.15<5.15.0-1027.32~20.04.1
5.15.0-1027.32~20.04.1
ubuntu/linux-intel-iotg-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-iot<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-kvm<5.4.0-1087.93
5.4.0-1087.93
ubuntu/linux-kvm<5.15.0-1030.35
5.15.0-1030.35
ubuntu/linux-kvm<5.19.0-1023.24
5.19.0-1023.24
ubuntu/linux-kvm<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-laptop<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-lowlatency<5.15.0-69.76
5.15.0-69.76
ubuntu/linux-lowlatency<5.19.0-1024.25
5.19.0-1024.25
ubuntu/linux-lowlatency<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-69.76~20.04.1
5.15.0-69.76~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-lowlatency-hwe-5.19<5.19.0-1024.25~22.04.1
5.19.0-1024.25~22.04.1
ubuntu/linux-lowlatency-hwe-5.19<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-lowlatency-hwe-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-lts-xenial<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-nvidia<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-nvidia-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-5.10<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-5.14<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-5.17<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-5.6<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-6.0<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-6.1<6.1.0-1007.7
6.1.0-1007.7
ubuntu/linux-oem-6.1<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-6.8<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oem-osp1<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oracle<5.4.0-1094.103
5.4.0-1094.103
ubuntu/linux-oracle<5.15.0-1032.38
5.15.0-1032.38
ubuntu/linux-oracle<5.19.0-1023.26
5.19.0-1023.26
ubuntu/linux-oracle<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oracle-5.0<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oracle-5.13<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oracle-5.15<5.15.0-1032.38~20.04.1
5.15.0-1032.38~20.04.1
ubuntu/linux-oracle-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oracle-5.4<5.4.0-1094.103~18.04.1
5.4.0-1094.103~18.04.1
ubuntu/linux-oracle-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-oracle-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-raspi<5.4.0-1081.92
5.4.0-1081.92
ubuntu/linux-raspi<5.15.0-1026.28
5.15.0-1026.28
ubuntu/linux-raspi<5.19.0-1018.25
5.19.0-1018.25
ubuntu/linux-raspi<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-raspi-5.4<5.4.0-1081.92~18.04.1
5.4.0-1081.92~18.04.1
ubuntu/linux-raspi-5.4<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-raspi2<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-riscv<5.19.0-1018.19
5.19.0-1018.19
ubuntu/linux-riscv<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-riscv-5.15<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-riscv-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-snapdragon<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-starfive<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-starfive-6.5<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
ubuntu/linux-xilinx-zynqmp<6.2~<5.4.229<5.15.87
6.2~
5.4.229
5.15.87
debian/linux
5.10.218-1
6.1.94-1
6.1.90-1
6.9.8-1
6.9.9-1

Remedy

The mitigation is to disable unprivileged user namespaces by setting user.max_user_namespaces to 0: ``` # echo "user.max_user_namespaces=0" > /etc/sysctl.d/userns.conf # sysctl -p /etc/sysctl.d/userns.conf ``` It is also possible to prevent the affected code from being loaded by blacklisting the `cbq` kernel module. For instructions on how to blacklist a kernel module, please see https://access.redhat.com/solutions/41278.

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