CVE-2023-4623: Use-after-free in Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component
First published: Wed Sep 06 2023(Updated: )
A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free. We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f.
Credit: cve-coordination@google.com cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <=2.5.75 | |
| Linux Linux kernel | =2.6.12-rc1 | |
| IBM QRadar SIEM | <=7.5 - 7.5.0 UP8 IF01 | |
| Linux Linux kernel | >=2.6.12<4.14.327 | |
| Linux Linux kernel | >=4.15<4.19.295 | |
| Linux Linux kernel | >=4.20<5.4.257 | |
| Linux Linux kernel | >=5.5<5.10.195 | |
| Linux Linux kernel | >=5.11<5.15.132 | |
| Linux Linux kernel | >=5.16<6.1.53 | |
| Linux Linux kernel | >=6.2<6.4.16 | |
| Linux Linux kernel | >=6.5<6.5.3 | |
| Debian Debian Linux | =10.0 | |
| ubuntu/linux | <4.15.0-219.230 | 4.15.0-219.230 |
| ubuntu/linux | <5.4.0-165.182 | 5.4.0-165.182 |
| ubuntu/linux | <5.15.0-87.97 | 5.15.0-87.97 |
| ubuntu/linux | <6.2.0-35.35 | 6.2.0-35.35 |
| ubuntu/linux | <3.13.0-194.245 | 3.13.0-194.245 |
| ubuntu/linux | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux | <4.4.0-246.280 | 4.4.0-246.280 |
| ubuntu/linux-allwinner-5.19 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws | <4.15.0-1162.175 | 4.15.0-1162.175 |
| ubuntu/linux-aws | <5.4.0-1112.121 | 5.4.0-1112.121 |
| ubuntu/linux-aws | <5.15.0-1048.53 | 5.15.0-1048.53 |
| ubuntu/linux-aws | <6.2.0-1014.14 | 6.2.0-1014.14 |
| ubuntu/linux-aws | <4.4.0-1124.130 | 4.4.0-1124.130 |
| ubuntu/linux-aws | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws | <4.4.0-1162.177 | 4.4.0-1162.177 |
| ubuntu/linux-aws-5.15 | <5.15.0-1048.53~20.04.1 | 5.15.0-1048.53~20.04.1 |
| ubuntu/linux-aws-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws-5.4 | <5.4.0-1112.121~18.04.2 | 5.4.0-1112.121~18.04.2 |
| ubuntu/linux-aws-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws-6.2 | <6.2.0-1014.14~22.04.1 | 6.2.0-1014.14~22.04.1 |
| ubuntu/linux-aws-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws-fips | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws-hwe | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-aws-hwe | <4.15.0-1162.175~16.04.1 | 4.15.0-1162.175~16.04.1 |
| ubuntu/linux-azure | <5.4.0-1118.125 | 5.4.0-1118.125 |
| ubuntu/linux-azure | <5.15.0-1050.57 | 5.15.0-1050.57 |
| ubuntu/linux-azure | <6.2.0-1015.15 | 6.2.0-1015.15 |
| ubuntu/linux-azure | <4.15.0-1171.186~14.04.1 | 4.15.0-1171.186~14.04.1 |
| ubuntu/linux-azure | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure | <4.15.0-1171.186~16.04.1 | 4.15.0-1171.186~16.04.1 |
| ubuntu/linux-azure-4.15 | <4.15.0-1171.186 | 4.15.0-1171.186 |
| ubuntu/linux-azure-4.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-5.15 | <5.15.0-1050.57~20.04.1 | 5.15.0-1050.57~20.04.1 |
| ubuntu/linux-azure-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-5.4 | <5.4.0-1118.125~18.04.1 | 5.4.0-1118.125~18.04.1 |
| ubuntu/linux-azure-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-6.2 | <6.2.0-1015.15~22.04.1 | 6.2.0-1015.15~22.04.1 |
| ubuntu/linux-azure-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-fde | <5.15.0-1050.57.1 | 5.15.0-1050.57.1 |
| ubuntu/linux-azure-fde | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-fde-5.15 | <5.15.0-1050.57~20.04.1.1 | 5.15.0-1050.57~20.04.1.1 |
| ubuntu/linux-azure-fde-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-fde-5.19 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-fde-6.2 | <6.2.0-1015.15~22.04.1 | 6.2.0-1015.15~22.04.1 |
| ubuntu/linux-azure-fde-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-azure-fips | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-bluefield | <5.4.0-1073.79 | 5.4.0-1073.79 |
| ubuntu/linux-bluefield | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-fips | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp | <5.4.0-1116.125 | 5.4.0-1116.125 |
| ubuntu/linux-gcp | <5.15.0-1045.53 | 5.15.0-1045.53 |
| ubuntu/linux-gcp | <6.2.0-1017.19 | 6.2.0-1017.19 |
| ubuntu/linux-gcp | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp | <4.15.0-1156.173~16.04.1 | 4.15.0-1156.173~16.04.1 |
| ubuntu/linux-gcp-4.15 | <4.15.0-1156.173 | 4.15.0-1156.173 |
| ubuntu/linux-gcp-4.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp-5.15 | <5.15.0-1045.53~20.04.2 | 5.15.0-1045.53~20.04.2 |
| ubuntu/linux-gcp-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp-5.19 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp-5.4 | <5.4.0-1116.125~18.04.1 | 5.4.0-1116.125~18.04.1 |
| ubuntu/linux-gcp-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp-6.2 | <6.2.0-1017.19~22.04.1 | 6.2.0-1017.19~22.04.1 |
| ubuntu/linux-gcp-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gcp-fips | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gke | <5.15.0-1045.50 | 5.15.0-1045.50 |
| ubuntu/linux-gke | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gkeop | <5.4.0-1079.83 | 5.4.0-1079.83 |
| ubuntu/linux-gkeop | <5.15.0-1031.37 | 5.15.0-1031.37 |
| ubuntu/linux-gkeop | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-gkeop-5.15 | <5.15.0-1031.37~20.04.1 | 5.15.0-1031.37~20.04.1 |
| ubuntu/linux-gkeop-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-hwe | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-hwe | <4.15.0-219.230~16.04.1 | 4.15.0-219.230~16.04.1 |
| ubuntu/linux-hwe-5.15 | <5.15.0-87.97~20.04.1 | 5.15.0-87.97~20.04.1 |
| ubuntu/linux-hwe-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-hwe-5.4 | <5.4.0-165.182~18.04.1 | 5.4.0-165.182~18.04.1 |
| ubuntu/linux-hwe-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-hwe-6.2 | <6.2.0-35.35~22.04.1 | 6.2.0-35.35~22.04.1 |
| ubuntu/linux-hwe-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-hwe-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-ibm | <5.4.0-1059.64 | 5.4.0-1059.64 |
| ubuntu/linux-ibm | <5.15.0-1041.44 | 5.15.0-1041.44 |
| ubuntu/linux-ibm | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-ibm-5.15 | <5.15.0-1041.44~20.04.1 | 5.15.0-1041.44~20.04.1 |
| ubuntu/linux-ibm-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-ibm-5.4 | <5.4.0-1059.64~18.04.1 | 5.4.0-1059.64~18.04.1 |
| ubuntu/linux-ibm-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-intel | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-intel-iot-realtime | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-intel-iotg | <5.15.0-1043.49 | 5.15.0-1043.49 |
| ubuntu/linux-intel-iotg | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-intel-iotg-5.15 | <5.15.0-1043.49~20.04.1 | 5.15.0-1043.49~20.04.1 |
| ubuntu/linux-intel-iotg-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-iot | <5.4.0-1024.25 | 5.4.0-1024.25 |
| ubuntu/linux-iot | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-kvm | <4.15.0-1146.151 | 4.15.0-1146.151 |
| ubuntu/linux-kvm | <5.4.0-1101.107 | 5.4.0-1101.107 |
| ubuntu/linux-kvm | <5.15.0-1045.50 | 5.15.0-1045.50 |
| ubuntu/linux-kvm | <6.2.0-1015.15 | 6.2.0-1015.15 |
| ubuntu/linux-kvm | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-kvm | <4.4.0-1125.135 | 4.4.0-1125.135 |
| ubuntu/linux-laptop | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lowlatency | <5.15.0-87.96 | 5.15.0-87.96 |
| ubuntu/linux-lowlatency | <6.2.0-1015.15 | 6.2.0-1015.15 |
| ubuntu/linux-lowlatency | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lowlatency-hwe-5.15 | <5.15.0-87.96~20.04.1 | 5.15.0-87.96~20.04.1 |
| ubuntu/linux-lowlatency-hwe-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lowlatency-hwe-5.19 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lowlatency-hwe-6.2 | <6.2.0-1015.15~22.04.1 | 6.2.0-1015.15~22.04.1 |
| ubuntu/linux-lowlatency-hwe-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lowlatency-hwe-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lowlatency-hwe-6.8 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-lts-xenial | <4.4.0-246.280~14.04.1 | 4.4.0-246.280~14.04.1 |
| ubuntu/linux-lts-xenial | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-nvidia | <5.15.0-1039.39 | 5.15.0-1039.39 |
| ubuntu/linux-nvidia | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-nvidia-6.2 | <6.2.0-1011.11 | 6.2.0-1011.11 |
| ubuntu/linux-nvidia-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-nvidia-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-nvidia-6.8 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-nvidia-lowlatency | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oem-5.17 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oem-6.0 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oem-6.1 | <6.1.0-1023.23 | 6.1.0-1023.23 |
| ubuntu/linux-oem-6.1 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oem-6.5 | <6.5.0-1004.4 | 6.5.0-1004.4 |
| ubuntu/linux-oem-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oem-6.8 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oracle | <4.15.0-1125.136 | 4.15.0-1125.136 |
| ubuntu/linux-oracle | <5.4.0-1111.120 | 5.4.0-1111.120 |
| ubuntu/linux-oracle | <5.15.0-1046.52 | 5.15.0-1046.52 |
| ubuntu/linux-oracle | <6.2.0-1014.14 | 6.2.0-1014.14 |
| ubuntu/linux-oracle | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oracle | <4.15.0-1125.136~16.04.1 | 4.15.0-1125.136~16.04.1 |
| ubuntu/linux-oracle-5.15 | <5.15.0-1046.52~20.04.1 | 5.15.0-1046.52~20.04.1 |
| ubuntu/linux-oracle-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oracle-5.4 | <5.4.0-1111.120~18.04.1 | 5.4.0-1111.120~18.04.1 |
| ubuntu/linux-oracle-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-oracle-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-raspi | <5.4.0-1096.107 | 5.4.0-1096.107 |
| ubuntu/linux-raspi | <5.15.0-1041.44 | 5.15.0-1041.44 |
| ubuntu/linux-raspi | <6.2.0-1015.17 | 6.2.0-1015.17 |
| ubuntu/linux-raspi | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-raspi-5.4 | <5.4.0-1096.107~18.04.1 | 5.4.0-1096.107~18.04.1 |
| ubuntu/linux-raspi-5.4 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-raspi-realtime | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-realtime | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-riscv | <6.2.0-35.35.1 | 6.2.0-35.35.1 |
| ubuntu/linux-riscv | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-riscv-5.15 | <5.15.0-1044.48~20.04.1 | 5.15.0-1044.48~20.04.1 |
| ubuntu/linux-riscv-5.15 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-riscv-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-riscv-6.8 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-starfive | <6.2.0-1007.8 | 6.2.0-1007.8 |
| ubuntu/linux-starfive | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-starfive-6.2 | <6.2.0-1007.8~22.04.1 | 6.2.0-1007.8~22.04.1 |
| ubuntu/linux-starfive-6.2 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-starfive-6.5 | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| ubuntu/linux-xilinx-zynqmp | <5.4.0-1032.36 | 5.4.0-1032.36 |
| ubuntu/linux-xilinx-zynqmp | <5.15.0-1025.29 | 5.15.0-1025.29 |
| ubuntu/linux-xilinx-zynqmp | <6.6~<5.4.257<5.15.132<6.5.3 | 6.6~ 5.4.257 5.15.132 6.5.3 |
| debian/linux | 5.10.223-1 6.1.106-3 6.1.99-1 6.10.6-1 6.10.7-1 |
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Reference Links
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b3d26c5702c7d6c45456326e56d2ccf3f103e60f
- https://kernel.dance/b3d26c5702c7d6c45456326e56d2ccf3f103e60f
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://launchpad.net/bugs/cve/CVE-2023-4623
- https://git.kernel.org/linus/b3d26c5702c7d6c45456326e56d2ccf3f103e60f
- https://ubuntu.com/security/notices/USN-6415-1
- https://ubuntu.com/security/notices/USN-6439-1
- https://ubuntu.com/security/notices/USN-6440-1
- https://ubuntu.com/security/notices/USN-6441-1
- https://ubuntu.com/security/notices/USN-6442-1
- https://ubuntu.com/security/notices/USN-6444-1
- https://ubuntu.com/security/notices/USN-6445-1
- https://ubuntu.com/security/notices/USN-6446-1
- https://ubuntu.com/security/notices/USN-6440-2
- https://ubuntu.com/security/notices/USN-6439-2
- https://ubuntu.com/security/notices/USN-6441-2
- https://ubuntu.com/security/notices/USN-6444-2
- https://ubuntu.com/security/notices/USN-6445-2
- https://ubuntu.com/security/notices/USN-6446-2
- https://ubuntu.com/security/notices/USN-6440-3
- https://ubuntu.com/security/notices/USN-6446-3
- https://ubuntu.com/security/notices/USN-6441-3
- https://ubuntu.com/security/notices/USN-6460-1
- https://ubuntu.com/security/notices/USN-6466-1
- https://www.cve.org/CVERecord?id=CVE-2023-4623
- https://nvd.nist.gov/vuln/detail/CVE-2023-4623
- https://security-tracker.debian.org/tracker/CVE-2023-4623
- https://git.kernel.org/linus/1da177e4c3f41524e886b7f1b8a0c1fc7321cac2
- https://ubuntu.com/security/CVE-2023-4623
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2249630
- https://access.redhat.com/errata/RHSA-2024:0340
- https://access.redhat.com/errata/RHSA-2024:0378
- https://access.redhat.com/errata/RHSA-2024:0381
- https://access.redhat.com/errata/RHSA-2024:0386
- https://access.redhat.com/errata/RHSA-2024:0431
- https://access.redhat.com/errata/RHSA-2024:0432
- https://access.redhat.com/errata/RHSA-2024:0461
- https://access.redhat.com/errata/RHSA-2024:0439
- https://access.redhat.com/errata/RHSA-2024:0448
- https://access.redhat.com/errata/RHSA-2024:0412
- https://access.redhat.com/errata/RHSA-2024:0554
- https://access.redhat.com/errata/RHSA-2024:0563
- https://access.redhat.com/errata/RHSA-2024:0562
- https://access.redhat.com/errata/RHSA-2024:0593
- https://access.redhat.com/errata/RHSA-2024:0575
- https://access.redhat.com/errata/RHSA-2024:0876
- https://access.redhat.com/errata/RHSA-2024:0881
- https://access.redhat.com/errata/RHSA-2024:0897
- https://access.redhat.com/errata/RHSA-2024:1268
- https://access.redhat.com/errata/RHSA-2024:1269
- https://access.redhat.com/errata/RHSA-2024:1278
- https://access.redhat.com/errata/RHSA-2024:1747
- https://access.redhat.com/errata/RHSA-2024:1746
- https://access.redhat.com/errata/RHSA-2024:1960
- https://access.redhat.com/errata/RHSA-2024:2003
- https://access.redhat.com/errata/RHSA-2024:2004
- https://bugzilla.redhat.com/show_bug.cgi?id=2237757
- https://exchange.xforce.ibmcloud.com/vulnerabilities/265426
- https://www.ibm.com/support/pages/node/7150684 (Advisory)
Parent vulnerabilities
(Appears in the following advisories)
Frequently Asked Questions
What is CVE-2023-4623?
CVE-2023-4623 is a use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component that can be exploited to achieve local privilege escalation.
How can CVE-2023-4623 be exploited?
CVE-2023-4623 can be exploited by a local attacker to achieve privilege escalation.
What software is affected by CVE-2023-4623?
The Linux kernel versions up to and including 2.5.75 and version 2.6.12-rc1 are affected by CVE-2023-4623.
What is the severity of CVE-2023-4623?
CVE-2023-4623 has a severity rating of 7.8 (high).
How can I fix CVE-2023-4623?
To fix CVE-2023-4623, it is recommended to update to a patched version of the Linux kernel.
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