Description
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. When u32_change() is called on an existing filter, the whole tcf_result struct is always copied into the new instance of the filter. This causes a problem when updating a filter bound to a class, as tcf_unbind_filter() is always called on the old instance in the success path, decreasing filter_cnt of the still referenced class and allowing it to be deleted, leading to a use-after-free. We recommend upgrading past commit 3044b16e7c6fe5d24b1cdbcf1bd0a9d92d1ebd81.
Details
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.15.0-84.93 |
| linux-allwinner-5.19 | — | — |
| linux-aws | — | 5.15.0-1045.50 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.15 | — | 5.15.0-1045.50~20.04.1 |
| linux-aws-5.19 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1110.119~18.04.1 |
| linux-aws-5.8 | — | — |
| linux-aws-6.2 | — | 6.2.0-1012.12~22.04.1 |
| linux-aws-fips | — | — |
| linux-aws-hwe | — | 4.15.0-1161.174~16.04.1 |
| linux-azure | — | 5.15.0-1047.54 |
| linux-azure-4.15 | — | 4.15.0-1170.185 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.15 | — | 5.15.0-1047.54~20.04.1 |
| linux-azure-5.19 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1116.123~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-6.2 | — | 6.2.0-1012.12~22.04.1 |
| linux-azure-edge | — | — |
| linux-azure-fde | — | 5.15.0-1047.54.1 |
| linux-azure-fde-5.19 | — | — |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-fips | — | — |
| linux-gcp | — | 5.15.0-1042.50 |
| linux-gcp-4.15 | — | 4.15.0-1155.172 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.15 | — | 5.15.0-1042.50~20.04.1 |
| linux-gcp-5.19 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1113.122~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-6.2 | — | 6.2.0-1014.14~22.04.1 |
| linux-gcp-fips | — | — |
| linux-gke | — | 5.15.0-1042.47 |
| linux-gke-4.15 | — | — |
| linux-gke-5.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.15.0-1028.33 |
| linux-gkeop-5.15 | — | 5.15.0-1028.33~20.04.1 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.15 | — | 5.15.0-84.93~20.04.1 |
| linux-hwe-5.19 | — | — |
| linux-hwe-5.4 | — | 5.4.0-163.180~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-6.2 | — | 6.2.0-33.33~22.04.1 |
| linux-hwe-edge | — | — |
| linux-ibm | — | 5.15.0-1038.41 |
| linux-ibm-5.15 | — | 5.15.0-1038.41~20.04.1 |
| linux-ibm-5.4 | — | 5.4.0-1057.62~18.04.1 |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | 5.15.0-1039.41 |
| linux-intel-iotg | — | 5.15.0-1040.46 |
| linux-intel-iotg-5.15 | — | 5.15.0-1040.46~20.04.1 |
| linux-iot | — | 5.4.0-1022.23 |
| linux-kvm | — | 5.15.0-1042.47 |
| linux-lowlatency | — | 5.15.0-84.93 |
| linux-lowlatency-hwe-5.15 | — | 5.15.0-84.93~20.04.1 |
| linux-lowlatency-hwe-5.19 | — | — |
| linux-lowlatency-hwe-6.2 | — | 6.2.0-1013.13~22.04.1 |
| linux-lts-xenial | — | 4.4.0-245.279~14.04.1 |
| linux-nvidia | — | 5.15.0-1033.33 |
| linux-nvidia-6.2 | — | — |
| linux-nvidia-tegra | — | 5.15.0-1018.18 |
| linux-nvidia-tegra-5.15 | — | 5.15.0-1018.18~20.04.1 |
| linux-nvidia-tegra-igx | — | 5.15.0-1005.5 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.14 | — | — |
| linux-oem-5.17 | — | — |
| linux-oem-5.6 | — | — |
| linux-oem-6.0 | — | — |
| linux-oem-6.1 | — | 6.1.0-1021.21 |
| linux-oracle | — | 5.15.0-1044.50 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.15 | — | 5.15.0-1044.50~20.04.1 |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1109.118~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.15.0-1038.41 |
| linux-raspi-5.4 | — | 5.4.0-1094.105~18.04.1 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | 5.15.0-1046.52 |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.15 | — | 5.15.0-1041.45~20.04.1 |
| linux-riscv-5.19 | — | — |
| linux-riscv-5.8 | — | — |
| linux-starfive-5.19 | — | — |
| linux-xilinx-zynqmp | — | 5.15.0-1025.29 |
References
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