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7.9
CVE-2026-68121: Linux kernel PPPoE can corrupt memory during packet send
CVE-2026-68121 · published 2 months ago
Summary
The Linux operating system’s PPPoE networking code could write data to a part of memory that had been moved, potentially causing crashes or other unexpected behavior. This happens when certain network devices are added while data is being prepared for sending. Updating the code to recalculate the header location fixes the issue; applying the latest kernel updates resolves the risk.
What to do
- Update debian linux to version 6.12.101-1.
- Update debian linux to version 7.1.6-1.
- Update debian linux-6.12 to version 6.12.101-1~deb12u1.
- Update linux kernel to version 7.1.6.
- Update debian linux to version 6.1.187-1.
- Update canonical linux-aws-5.15 to version 5.15.0-1117.124~20.04.1.
- Update canonical linux-azure-5.15 to version 5.15.0-1123.132~20.04.1.
- Update canonical linux-azure-fde-5.15 to version 5.15.0-1122.131~20.04.1.
- Update canonical linux-gcp-5.15 to version 5.15.0-1118.128~20.04.1.
- Update canonical linux-hwe-5.15 to version 5.15.0-198.208~20.04.1.
- Update canonical linux-ibm-5.15 to version 5.15.0-1111.115~20.04.1.
- Update canonical linux-intel-iotg-5.15 to version 5.15.0-1112.118~20.04.1.
- Update canonical linux-lowlatency-hwe-5.15 to version 5.15.0-195.205~20.04.1.
- Update canonical linux-oracle-5.15 to version 5.15.0-1114.120~20.04.1.
- Update canonical linux to version 5.15.0-198.208.
- Update canonical linux-aws to version 5.15.0-1117.124.
- Update canonical linux-azure to version 5.15.0-1123.132.
- Update canonical linux-azure-fde to version 5.15.0-1122.131.
- Update canonical linux-gcp to version 5.15.0-1118.128.
- Update canonical linux-gke to version 5.15.0-1113.119.
- Update canonical linux-gkeop to version 5.15.0-1100.108.
- Update canonical linux-ibm to version 5.15.0-1111.115.
- Update canonical linux-intel-iotg to version 5.15.0-1112.118.
- Update canonical linux-kvm to version 5.15.0-1109.114.
- Update canonical linux-lowlatency to version 5.15.0-195.205.
- Update canonical linux-oracle to version 5.15.0-1114.120.
- Update canonical linux-xilinx-zynqmp to version 5.15.0-1080.84.
- Update canonical linux-aws-fips to version 5.15.0-1117.124+fips1.
- Update canonical linux-azure-fips to version 5.15.0-1123.132+fips1.
- Update canonical linux-fips to version 5.15.0-198.208+fips1.
- Update canonical linux-gcp-fips to version 5.15.0-1118.128+fips1.
- Update canonical linux-intel-iot-realtime to version 5.15.0-1109.111.
- Update canonical linux-realtime to version 5.15.0-1116.125.
- Update bellsoft linux-lts to version 6.1.189-r0.
- Update bellsoft linux-lts to version 6.12.103-r0.
- Update bellsoft linux-lts to version 6.18.43-r0.
- Update canonical linux-azure-7.0 to version 7.0.0-1017.17~24.04.1.
- Update canonical linux-azure-fde-7.0 to version 7.0.0-1016.16~24.04.1.
- Update canonical linux-nvidia-tegra to version 6.8.0-1036.39.
- Update canonical linux to version 7.0.0-38.38.
- Update canonical linux-aws to version 7.0.0-1014.14.
- Update canonical linux-azure to version 7.0.0-1017.17.
- Update canonical linux-azure-fde to version 7.0.0-1016.16.
- Update canonical linux-gcp to version 7.0.0-1014.14.
- Update canonical linux-gke to version 7.0.0-1008.9.
- Update canonical linux-ibm to version 7.0.0-1015.15.
- Update canonical linux-oem-7.0 to version 7.0.0-1015.15.
- Update canonical linux-oracle to version 7.0.0-1013.13.
- Update canonical linux-realtime to version 7.0.0-38.38.1.
- Update canonical linux-nvidia to version 5.15.0-1112.113.
- Update canonical linux-aws-7.0 to version 7.0.0-1014.14~24.04.1.
- Update canonical linux-gcp-7.0 to version 7.0.0-1014.14~24.04.1.
- Update canonical linux-hwe-7.0 to version 7.0.0-38.38~24.04.4.
- Update canonical linux-oracle-7.0 to version 7.0.0-1013.13~24.04.1.
- Update canonical linux-riscv-5.15 to version 5.15.0-1111.115~20.04.1.
- Update canonical linux-bluefield to version 5.15.0-1101.103.
- Update canonical linux-riscv-7.0 to version 7.0.0-38.38.1~24.04.1.
- Update canonical linux-riscv to version 7.0.0-38.38.1.
- Update canonical linux to version 6.8.0-147.147.
- Update canonical linux-aws to version 6.8.0-1067.70.
- Update canonical linux-azure to version 6.8.0-1071.79.
- Update canonical linux-azure-fde to version 6.8.0-1069.76.
- Update canonical linux-gcp to version 6.8.0-1071.79.
- Update canonical linux-gke to version 6.8.0-1066.74.
- Update canonical linux-gkeop to version 6.8.0-1052.56.
- Update canonical linux-ibm to version 6.8.0-1067.68.
- Update canonical linux-lowlatency to version 6.8.0-147.147.1.
- Update canonical linux-oracle to version 6.8.0-1064.67.
- Update canonical linux-bluefield to version 6.8.0-1033.38.
- Update canonical linux-realtime to version 6.8.1-1062.63.
- Update canonical linux-aws-fips to version 6.8.0-1067.70+fips1.
- Update canonical linux-azure-fips to version 6.8.0-1071.79+fips1.
- Update canonical linux-fips to version 6.8.0-147.147+fips1.
- Update canonical linux-gcp-fips to version 6.8.0-1071.79+fips1.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Debian:11 | debian | linux | All versions |
| Debian:12 | debian | linux |
< 6.1.187-1 Fix: upgrade to 6.1.187-1
|
| Debian:13 | debian | linux |
< 6.12.101-1 Fix: upgrade to 6.12.101-1
|
| Debian:14 | debian | linux |
< 7.1.6-1 Fix: upgrade to 7.1.6-1
|
| Debian:12 | debian | linux-6.12 |
< 6.12.101-1~deb12u1 Fix: upgrade to 6.12.101-1~deb12u1
|
| Ubuntu:Pro:14.04:LTS | canonical | linux | All versions |
| Ubuntu:Pro:14.04:LTS | canonical | linux-aws | All versions |
| Ubuntu:Pro:14.04:LTS | canonical | linux-azure | All versions |
| Ubuntu:Pro:14.04:LTS | canonical | linux-lts-xenial | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-aws-hwe | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-gcp | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-hwe | All versions |
| Ubuntu:16.04:LTS | canonical | linux-hwe-edge | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-kvm | All versions |
| Ubuntu:Pro:16.04:LTS | canonical | linux-oracle | All versions |
| Ubuntu:Pro:FIPS:16.04:LTS | canonical | linux-fips | All versions |
| Ubuntu:18.04:LTS | canonical | linux-aws-5.0 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-aws-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-aws-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-azure-4.15 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-azure-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-azure-edge | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-gcp-4.15 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gcp-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-gcp-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gke-4.15 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gke-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-gkeop-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-hwe-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-ibm-5.4 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-oem | All versions |
| Ubuntu:18.04:LTS | canonical | linux-oracle-5.0 | All versions |
| Ubuntu:18.04:LTS | canonical | linux-oracle-5.3 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-oracle-5.4 | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-raspi-5.4 | All versions |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-aws-fips | All versions |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-azure-fips | All versions |
| Ubuntu:Pro:FIPS-updates:18.04:LTS | canonical | linux-gcp-fips | All versions |
| Ubuntu:20.04:LTS | canonical | linux-aws-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-aws-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-aws-5.15 |
< 5.15.0-1117.124~20.04.1 Fix: upgrade to 5.15.0-1117.124~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-aws-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-azure-5.15 |
< 5.15.0-1123.132~20.04.1 Fix: upgrade to 5.15.0-1123.132~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-azure-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-azure-fde | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-azure-fde-5.15 |
< 5.15.0-1122.131~20.04.1 Fix: upgrade to 5.15.0-1122.131~20.04.1
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-bluefield | All versions |
Showing 50 of 224. Show the rest
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-gcp-5.15 |
< 5.15.0-1118.128~20.04.1 Fix: upgrade to 5.15.0-1118.128~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gke | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gke-5.15 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gkeop | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gkeop-5.15 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-hwe-5.15 |
< 5.15.0-198.208~20.04.1 Fix: upgrade to 5.15.0-198.208~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-hwe-5.8 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-ibm | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-ibm-5.15 |
< 5.15.0-1111.115~20.04.1 Fix: upgrade to 5.15.0-1111.115~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-intel-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-intel-iotg-5.15 |
< 5.15.0-1112.118~20.04.1 Fix: upgrade to 5.15.0-1112.118~20.04.1
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-iot | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-lowlatency-hwe-5.15 |
< 5.15.0-195.205~20.04.1 Fix: upgrade to 5.15.0-195.205~20.04.1
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-nvidia-tegra-5.15 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.10 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.13 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.14 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oem-5.6 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.11 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-oracle-5.15 |
< 5.15.0-1114.120~20.04.1 Fix: upgrade to 5.15.0-1114.120~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-oracle-5.8 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-raspi | All versions |
| Ubuntu:20.04:LTS | canonical | linux-raspi2 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-riscv | All versions |
| Ubuntu:20.04:LTS | canonical | linux-riscv-5.11 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-riscv-5.15 |
< 5.15.0-1111.115~20.04.1 Fix: upgrade to 5.15.0-1111.115~20.04.1
|
| Ubuntu:20.04:LTS | canonical | linux-riscv-5.8 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-xilinx-zynqmp | All versions |
| Ubuntu:22.04:LTS | canonical | linux-allwinner-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-aws-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-fde-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-fde-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-azure-fde-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-gcp-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-hwe-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-ibm-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-intel-iot-realtime | All versions |
| Ubuntu:22.04:LTS | canonical | linux-intel-iotg |
< 5.15.0-1112.118 Fix: upgrade to 5.15.0-1112.118
|
| Ubuntu:22.04:LTS | canonical | linux-lowlatency |
< 5.15.0-195.205 Fix: upgrade to 5.15.0-195.205
|
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency-hwe-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia |
< 5.15.0-1112.113 Fix: upgrade to 5.15.0-1112.113
|
| Ubuntu:22.04:LTS | canonical | linux-nvidia-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-tegra | All versions |
| Ubuntu:22.04:LTS | canonical | linux-nvidia-tegra-igx | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-5.17 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-6.0 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-6.1 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oem-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oracle-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-oracle-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-realtime | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-6.5 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-riscv-6.8 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-starfive-5.19 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-starfive-6.2 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-starfive-6.5 | All versions |
| Ubuntu:Pro:Realtime:22.04:LTS | canonical | linux-realtime-6.8 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-aws-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-aws-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-aws-7.0 |
< 7.0.0-1014.14~24.04.1 Fix: upgrade to 7.0.0-1014.14~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-azure-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-7.0 |
< 7.0.0-1017.17~24.04.1 Fix: upgrade to 7.0.0-1017.17~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-7.0 |
< 7.0.0-1016.16~24.04.1 Fix: upgrade to 7.0.0-1016.16~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-azure-nvidia | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-nvidia-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-7.0 |
< 7.0.0-1014.14~24.04.1 Fix: upgrade to 7.0.0-1014.14~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-hwe-7.0 |
< 7.0.0-38.38~24.04.4 Fix: upgrade to 7.0.0-38.38~24.04.4
|
| Ubuntu:24.04:LTS | canonical | linux-lowlatency-hwe-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-7.0 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-lowlatency | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.8 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle-7.0 |
< 7.0.0-1013.13~24.04.1 Fix: upgrade to 7.0.0-1013.13~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-raspi-realtime | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-6.17 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-7.0 |
< 7.0.0-38.38.1~24.04.1 Fix: upgrade to 7.0.0-38.38.1~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-xilinx | All versions |
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime-6.14 | All versions |
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime-6.17 | All versions |
| Ubuntu:26.04:LTS | canonical | linux-nvidia-bos | All versions |
| Ubuntu:26.04:LTS | canonical | linux-oem-7.0 |
< 7.0.0-1015.15 Fix: upgrade to 7.0.0-1015.15
|
| – | linux | linux |
< e6493a4d1ee17595766165fa446d45b7e0c318d0 2.6.12 < 7a56e7c9b08e08fd55a1bcada24cf4fe3782b722 |
| Linux | linux | kernel |
>= 6.19.0, < 7.1.6 Fix: upgrade to 7.1.6
|
| Ubuntu:22.04:LTS | canonical | linux |
< 5.15.0-198.208 Fix: upgrade to 5.15.0-198.208
|
| Ubuntu:22.04:LTS | canonical | linux-aws |
< 5.15.0-1117.124 Fix: upgrade to 5.15.0-1117.124
|
| Ubuntu:22.04:LTS | canonical | linux-azure |
< 5.15.0-1123.132 Fix: upgrade to 5.15.0-1123.132
|
| Ubuntu:22.04:LTS | canonical | linux-azure-fde |
< 5.15.0-1122.131 Fix: upgrade to 5.15.0-1122.131
|
| Ubuntu:22.04:LTS | canonical | linux-gcp |
< 5.15.0-1118.128 Fix: upgrade to 5.15.0-1118.128
|
| Ubuntu:22.04:LTS | canonical | linux-gke |
< 5.15.0-1113.119 Fix: upgrade to 5.15.0-1113.119
|
| Ubuntu:22.04:LTS | canonical | linux-gkeop |
< 5.15.0-1100.108 Fix: upgrade to 5.15.0-1100.108
|
| Ubuntu:22.04:LTS | canonical | linux-ibm |
< 5.15.0-1111.115 Fix: upgrade to 5.15.0-1111.115
|
| Ubuntu:22.04:LTS | canonical | linux-kvm |
< 5.15.0-1109.114 Fix: upgrade to 5.15.0-1109.114
|
| Ubuntu:22.04:LTS | canonical | linux-oracle |
< 5.15.0-1114.120 Fix: upgrade to 5.15.0-1114.120
|
| Ubuntu:22.04:LTS | canonical | linux-xilinx-zynqmp |
< 5.15.0-1080.84 Fix: upgrade to 5.15.0-1080.84
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-aws-fips |
< 5.15.0-1117.124+fips1 Fix: upgrade to 5.15.0-1117.124+fips1
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-azure-fips |
< 5.15.0-1123.132+fips1 Fix: upgrade to 5.15.0-1123.132+fips1
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-fips |
< 5.15.0-198.208+fips1 Fix: upgrade to 5.15.0-198.208+fips1
|
| Ubuntu:Pro:FIPS-updates:22.04:LTS | canonical | linux-gcp-fips |
< 5.15.0-1118.128+fips1 Fix: upgrade to 5.15.0-1118.128+fips1
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| Ubuntu:Pro:Realtime:22.04:LTS | canonical | linux-intel-iot-realtime |
< 5.15.0-1109.111 Fix: upgrade to 5.15.0-1109.111
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| Ubuntu:Pro:Realtime:22.04:LTS | canonical | linux-realtime |
< 5.15.0-1116.125 Fix: upgrade to 5.15.0-1116.125
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| Alpaquita:23 | bellsoft | linux-lts |
>= 6.1.182-r0, < 6.1.189-r0 Fix: upgrade to 6.1.189-r0
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| Alpaquita:25 | bellsoft | linux-lts |
>= 6.12.95-r0, < 6.12.103-r0 Fix: upgrade to 6.12.103-r0
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| Alpaquita:stream | bellsoft | linux-lts |
>= 6.18.38-r0, < 6.18.43-r0 Fix: upgrade to 6.18.43-r0
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| Ubuntu:24.04:LTS | canonical | linux-nvidia-tegra |
< 6.8.0-1036.39 Fix: upgrade to 6.8.0-1036.39
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| Ubuntu:26.04:LTS | canonical | linux |
< 7.0.0-38.38 Fix: upgrade to 7.0.0-38.38
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| Ubuntu:26.04:LTS | canonical | linux-aws |
< 7.0.0-1014.14 Fix: upgrade to 7.0.0-1014.14
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| Ubuntu:26.04:LTS | canonical | linux-azure |
< 7.0.0-1017.17 Fix: upgrade to 7.0.0-1017.17
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| Ubuntu:26.04:LTS | canonical | linux-azure-fde |
< 7.0.0-1016.16 Fix: upgrade to 7.0.0-1016.16
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| Ubuntu:26.04:LTS | canonical | linux-gcp |
< 7.0.0-1014.14 Fix: upgrade to 7.0.0-1014.14
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| Ubuntu:26.04:LTS | canonical | linux-gke |
< 7.0.0-1008.9 Fix: upgrade to 7.0.0-1008.9
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| Ubuntu:26.04:LTS | canonical | linux-ibm |
< 7.0.0-1015.15 Fix: upgrade to 7.0.0-1015.15
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| Ubuntu:26.04:LTS | canonical | linux-oracle |
< 7.0.0-1013.13 Fix: upgrade to 7.0.0-1013.13
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| Ubuntu:26.04:LTS | canonical | linux-realtime |
< 7.0.0-38.38.1 Fix: upgrade to 7.0.0-38.38.1
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| Ubuntu:Nvidia-BlueField:22.04:LTS | canonical | linux-bluefield |
< 5.15.0-1101.103 Fix: upgrade to 5.15.0-1101.103
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| Ubuntu:26.04:LTS | canonical | linux-riscv |
< 7.0.0-38.38.1 Fix: upgrade to 7.0.0-38.38.1
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| Ubuntu:24.04:LTS | canonical | linux-vmware | All versions |
| Ubuntu:24.04:LTS | canonical | linux |
< 6.8.0-147.147 Fix: upgrade to 6.8.0-147.147
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| Ubuntu:24.04:LTS | canonical | linux-aws |
< 6.8.0-1067.70 Fix: upgrade to 6.8.0-1067.70
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| Ubuntu:24.04:LTS | canonical | linux-azure |
< 6.8.0-1071.79 Fix: upgrade to 6.8.0-1071.79
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| Ubuntu:24.04:LTS | canonical | linux-azure-fde |
< 6.8.0-1069.76 Fix: upgrade to 6.8.0-1069.76
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| Ubuntu:24.04:LTS | canonical | linux-gcp |
< 6.8.0-1071.79 Fix: upgrade to 6.8.0-1071.79
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| Ubuntu:24.04:LTS | canonical | linux-gke |
< 6.8.0-1066.74 Fix: upgrade to 6.8.0-1066.74
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| Ubuntu:24.04:LTS | canonical | linux-gkeop |
< 6.8.0-1052.56 Fix: upgrade to 6.8.0-1052.56
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| Ubuntu:24.04:LTS | canonical | linux-ibm |
< 6.8.0-1067.68 Fix: upgrade to 6.8.0-1067.68
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| Ubuntu:24.04:LTS | canonical | linux-lowlatency |
< 6.8.0-147.147.1 Fix: upgrade to 6.8.0-147.147.1
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| Ubuntu:24.04:LTS | canonical | linux-oracle |
< 6.8.0-1064.67 Fix: upgrade to 6.8.0-1064.67
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| Ubuntu:Nvidia-BlueField:24.04:LTS | canonical | linux-bluefield |
< 6.8.0-1033.38 Fix: upgrade to 6.8.0-1033.38
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| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime |
< 6.8.1-1062.63 Fix: upgrade to 6.8.1-1062.63
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| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-aws-fips |
< 6.8.0-1067.70+fips1 Fix: upgrade to 6.8.0-1067.70+fips1
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| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-azure-fips |
< 6.8.0-1071.79+fips1 Fix: upgrade to 6.8.0-1071.79+fips1
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| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-fips |
< 6.8.0-147.147+fips1 Fix: upgrade to 6.8.0-147.147+fips1
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| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-gcp-fips |
< 6.8.0-1071.79+fips1 Fix: upgrade to 6.8.0-1071.79+fips1
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Original advisory text
pppoe: reload header pointer after dev_hard_header()
In the Linux kernel, the following vulnerability has been resolved: pppoe: reload header pointer after dev_hard_header() pppoe_sendmsg() saves a pointer to the PPPoE header before calling dev_hard_header(). Device header callbacks are allowed to reallocate the skb head, invalidating pointers into it. This can happen when a send is blocked in copy_from_user() while the first non-Ethernet port is added to an empty team device. The team's delegated GRE header callback then expands the skb head. PPPoE subsequently writes six bytes through the stale pointer into the freed head. Reload the PPPoE header through the skb's network-header offset after device header creation. pskb_expand_head() updates that offset when it relocates the head.
References
- https://ubuntu.com/security/notices/USN-8888-1 Vendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2026-68121 Vendor Advisory
- https://git.kernel.org/stable/c/6eed5ae7887a93160803d2b81ff88e75eefd4a4c URL
- https://git.kernel.org/stable/c/7a56e7c9b08e08fd55a1bcada24cf4fe3782b722 URL
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/68xxx/CVE-2026-68121... Vendor Advisory
- https://git.kernel.org/stable/c/ba3409369c5413cdf0dcbf3a928f76b48e8c3e6a URL
- https://nvd.nist.gov/vuln/detail/CVE-2026-68121 Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Product
- https://ubuntu.com/security/CVE-2026-68121 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-68121 Third Party Advisory
- https://git.kernel.org/stable/c/e6493a4d1ee17595766165fa446d45b7e0c318d0 Third Party Advisory
- https://git.kernel.org/stable/c/bed4caecd723693f750e13adbb2c42ca1249a3fd Third Party Advisory
- https://git.kernel.org/stable/c/7e9fbd7f96bcde63a7c798fe16b38cedee7a1501 Third Party Advisory
- https://git.kernel.org/stable/c/6866abf59976d273164a6624234d96a967280223 Third Party Advisory
- https://ubuntu.com/security/notices/USN-8889-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8887-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8886-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8888-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8887-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8875-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8887-3 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8917-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8918-1 Vendor Advisory
- https://git.kernel.org/stable/c/e9c238f6fe42fb1b4dba3a578277de32cb487937 Third Party Advisory
- https://ubuntu.com/security/notices/USN-8876-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8878-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8879-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8877-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8875-1 Vendor Advisory
- https://docs.bell-sw.com/security/cves/CVE-2026-68121 Vendor Advisory
Internet-facing
14 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit
- Gives an attacker full control
Severity
7.9
High
Type
CWE-416Use After Free
Timeline
Published10 Aug 2026
Updated4 Nov 2026
First seen10 Aug 2026
Sources
DEBIAN-CVE-2026-68121 · OSV
CVE-2026-68121 · NVD
CVE-2026-68121 · MITRE
UBUNTU-CVE-2026-68121 · OSV
CVE-2026-68121 · OSV
BELL-CVE-2026-68121 · OSV
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