Description
A remote denial of service vulnerability was found in the Linux kernel’s TIPC kernel module. The while loop in tipc_link_xmit() hits an unknown state while attempting to parse SKBs, which are not in the queue. Sending two small UDP packets to a system with a UDP bearer results in the CPU utilization for the system to instantly spike to 100%, causing a denial of service condition.
Details
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| linux | — | 5.4.0-67.75 |
| linux-aws | — | 5.4.0-1039.41 |
| linux-aws-5.0 | — | — |
| linux-aws-5.11 | — | — |
| linux-aws-5.13 | — | — |
| linux-aws-5.3 | — | — |
| linux-aws-5.4 | — | 5.4.0-1039.41~18.04.1 |
| linux-aws-5.8 | — | — |
| linux-aws-fips | — | — |
| linux-aws-hwe | — | 4.15.0-1095.102~16.04.1 |
| linux-azure | — | 5.4.0-1041.43 |
| linux-azure-4.15 | — | 4.15.0-1109.121 |
| linux-azure-5.11 | — | — |
| linux-azure-5.13 | — | — |
| linux-azure-5.3 | — | — |
| linux-azure-5.4 | — | 5.4.0-1041.43~18.04.1 |
| linux-azure-5.8 | — | — |
| linux-azure-edge | — | — |
| linux-azure-fips | — | — |
| linux-bluefield | — | — |
| linux-dell300x | — | 4.15.0-1013.17 |
| linux-fips | — | — |
| linux-gcp | — | 5.4.0-1038.41 |
| linux-gcp-4.15 | — | 4.15.0-1094.107 |
| linux-gcp-5.11 | — | — |
| linux-gcp-5.13 | — | — |
| linux-gcp-5.3 | — | — |
| linux-gcp-5.4 | — | 5.4.0-1038.41~18.04.1 |
| linux-gcp-5.8 | — | — |
| linux-gcp-fips | — | — |
| linux-gke | — | 5.4.0-1037.39 |
| linux-gke-4.15 | — | — |
| linux-gke-5.4 | — | — |
| linux-gkeop | — | 5.4.0-1011.12 |
| linux-gkeop-5.4 | — | — |
| linux-hwe | — | — |
| linux-hwe-5.11 | — | — |
| linux-hwe-5.13 | — | — |
| linux-hwe-5.4 | — | 5.4.0-67.75~18.04.1 |
| linux-hwe-5.8 | — | — |
| linux-hwe-edge | — | — |
| linux-intel-5.13 | — | — |
| linux-intel-iot-realtime | — | — |
| linux-kvm | — | 5.4.0-1034.35 |
| linux-lts-xenial | — | 4.4.0-240.274~14.04.1 |
| linux-oem | — | — |
| linux-oem-5.10 | — | — |
| linux-oem-5.13 | — | — |
| linux-oem-5.6 | — | — |
| linux-oracle | — | 5.4.0-1039.42 |
| linux-oracle-5.0 | — | — |
| linux-oracle-5.11 | — | — |
| linux-oracle-5.13 | — | — |
| linux-oracle-5.3 | — | — |
| linux-oracle-5.4 | — | 5.4.0-1039.42~18.04.1 |
| linux-oracle-5.8 | — | — |
| linux-raspi | — | 5.4.0-1030.33 |
| linux-raspi-5.4 | — | 5.4.0-1030.33~18.04.1 |
| linux-raspi-realtime | — | — |
| linux-raspi2 | — | — |
| linux-realtime | — | — |
| linux-riscv | — | — |
| linux-riscv-5.11 | — | — |
| linux-riscv-5.8 | — | — |
| linux-snapdragon | — | 4.15.0-1097.106 |
References
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