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6.3
CVE-2026-64508: Linux kernel BPF JIT may reuse old code predictions
CVE-2026-64508 · published 3 months ago
Summary
The Linux kernel's BPF just‑in‑time compiler could keep branch‑prediction data from a previous program when it reuses memory for a new one, potentially letting an attacker influence program flow. The update adds a step to clear those predictions before the memory is reused, reducing the risk. Apply the latest kernel updates for all listed Linux distributions to get the fix.
What to do
- Update debian linux to version 6.1.187-1.
- Update debian linux to version 7.1.4-1.
- Update debian linux-6.12 to version 6.12.100-1~deb12u1.
- Update debian linux to version 6.12.100-1.
- Update canonical rootio-linux to version 5.15.0-186.196.aikido.108.
- Update canonical linux-aws-7.0 to version 7.0.0-1012.12~24.04.1.
- Update canonical linux-gcp-7.0 to version 7.0.0-1011.11~24.04.1.
- Update canonical linux-hwe-7.0 to version 7.0.0-31.31~24.04.1.
- Update canonical linux-riscv-7.0 to version 7.0.0-31.31.1~24.04.1.
- Update canonical linux to version 7.0.0-31.31.
- Update canonical linux-aws to version 7.0.0-1012.12.
- Update canonical linux-gcp to version 7.0.0-1011.11.
- Update canonical linux-gke to version 7.0.0-1006.7.
- Update canonical linux-oem-7.0 to version 7.0.0-1013.13.
- Update canonical linux-realtime to version 7.0.0-31.31.1.
- Update canonical linux-riscv to version 7.0.0-31.31.1.
- Update canonical linux-azure-7.0 to version 7.0.0-1014.14~24.04.1.
- Update canonical linux-nvidia-7.0 to version 7.0.0-1018.18~24.04.1.
- Update canonical linux-azure to version 7.0.0-1014.14.
- Update canonical linux-ibm to version 7.0.0-1013.13.
- Update canonical linux-nvidia to version 7.0.0-1018.18.
- Update canonical linux-nvidia-bos to version 7.0.0-2018.18.
- Update canonical linux-oracle to version 7.0.0-1011.11.
- Update canonical linux-raspi to version 7.0.0-1019.19.
- Update canonical linux-oracle-7.0 to version 7.0.0-1011.11~24.04.1.
- 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 linux to version 5.15.0-198.208.aikido.116.
- Update rootio-linux to version 5.15.0-198.208.aikido.116.
- Update linux kernel to version 7.1.4.
- 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.
- Update canonical linux-azure-fde-7.0 to version 7.0.0-1013.13~24.04.1.
- Update canonical linux-azure-fde to version 7.0.0-1013.13.
- Update linux to version 5.15.0-202.212.aikido.118.
- Update rootio-linux to version 5.15.0-202.212.aikido.118.
- Update linux linux to version 6e52c240c43a601b681e3a4e58fc5685114d4726 or later.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| 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 | All versions |
| 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 | All versions |
| 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 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-bluefield | All 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 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gcp-5.8 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-gke | All versions |
Showing 50 of 209. Show the rest
| Ecosystem | Vendor | Product | Affected 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 | All versions |
| 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 | All versions |
| Ubuntu:20.04:LTS | canonical | linux-intel-5.13 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-intel-iotg-5.15 | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-iot | All versions |
| Ubuntu:Pro:20.04:LTS | canonical | linux-lowlatency-hwe-5.15 | All versions |
| 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 | All versions |
| 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 | All versions |
| 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 | All versions |
| Ubuntu:22.04:LTS | canonical | linux-lowlatency | All versions |
| 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 | All versions |
| 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 |
< 7.0.0-1012.12~24.04.1 Fix: upgrade to 7.0.0-1012.12~24.04.1
|
| 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 |
< 7.0.0-1014.14~24.04.1 Fix: upgrade to 7.0.0-1014.14~24.04.1
|
| 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 |
< 7.0.0-1013.13~24.04.1 Fix: upgrade to 7.0.0-1013.13~24.04.1
|
| 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 |
< 7.0.0-1011.11~24.04.1 Fix: upgrade to 7.0.0-1011.11~24.04.1
|
| 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 |
< 7.0.0-31.31~24.04.1 Fix: upgrade to 7.0.0-31.31~24.04.1
|
| 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 |
< 7.0.0-1018.18~24.04.1 Fix: upgrade to 7.0.0-1018.18~24.04.1
|
| 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 |
< 7.0.0-1011.11~24.04.1 Fix: upgrade to 7.0.0-1011.11~24.04.1
|
| 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 |
< 7.0.0-31.31.1~24.04.1 Fix: upgrade to 7.0.0-31.31.1~24.04.1
|
| 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 |
< 7.0.0-2018.18 Fix: upgrade to 7.0.0-2018.18
|
| Ubuntu:26.04:LTS | canonical | linux-oem-7.0 |
< 7.0.0-1013.13 Fix: upgrade to 7.0.0-1013.13
|
| Debian:12 | debian | linux |
< 6.1.187-1 Fix: upgrade to 6.1.187-1
|
| Debian:14 | debian | linux |
< 7.1.4-1 Fix: upgrade to 7.1.4-1
|
| Debian:12 | debian | linux-6.12 |
< 6.12.100-1~deb12u1 Fix: upgrade to 6.12.100-1~deb12u1
|
| – | linux | linux |
5.18 < 6e52c240c43a601b681e3a4e58fc5685114d4726 |
| Debian:13 | debian | linux |
< 6.12.100-1 Fix: upgrade to 6.12.100-1
|
| Root:Ubuntu:22.04 | canonical | rootio-linux |
< 5.15.0-186.196.aikido.108 Fix: upgrade to 5.15.0-186.196.aikido.108
|
| Ubuntu:26.04:LTS | canonical | linux |
< 7.0.0-31.31 Fix: upgrade to 7.0.0-31.31
|
| Ubuntu:26.04:LTS | canonical | linux-aws |
< 7.0.0-1012.12 Fix: upgrade to 7.0.0-1012.12
|
| Ubuntu:26.04:LTS | canonical | linux-gcp |
< 7.0.0-1011.11 Fix: upgrade to 7.0.0-1011.11
|
| Ubuntu:26.04:LTS | canonical | linux-gke |
< 7.0.0-1006.7 Fix: upgrade to 7.0.0-1006.7
|
| Ubuntu:26.04:LTS | canonical | linux-realtime |
< 7.0.0-31.31.1 Fix: upgrade to 7.0.0-31.31.1
|
| Ubuntu:26.04:LTS | canonical | linux-riscv |
< 7.0.0-31.31.1 Fix: upgrade to 7.0.0-31.31.1
|
| Ubuntu:26.04:LTS | canonical | linux-azure |
< 7.0.0-1014.14 Fix: upgrade to 7.0.0-1014.14
|
| Ubuntu:26.04:LTS | canonical | linux-ibm |
< 7.0.0-1013.13 Fix: upgrade to 7.0.0-1013.13
|
| Ubuntu:26.04:LTS | canonical | linux-nvidia |
< 7.0.0-1018.18 Fix: upgrade to 7.0.0-1018.18
|
| Ubuntu:26.04:LTS | canonical | linux-oracle |
< 7.0.0-1011.11 Fix: upgrade to 7.0.0-1011.11
|
| Ubuntu:26.04:LTS | canonical | linux-raspi |
< 7.0.0-1019.19 Fix: upgrade to 7.0.0-1019.19
|
| Alpaquita:23 | bellsoft | linux-lts |
>= 6.1.182-r0, < 6.1.189-r0 Fix: upgrade to 6.1.189-r0
|
| Alpaquita:25 | bellsoft | linux-lts |
>= 6.12.95-r0, < 6.12.103-r0 Fix: upgrade to 6.12.103-r0
|
| Alpaquita:stream | bellsoft | linux-lts |
>= 6.18.38-r0, < 6.18.43-r0 Fix: upgrade to 6.18.43-r0
|
| Root:Ubuntu:22.04 | – | linux |
< 5.15.0-198.208.aikido.116 < 5.15.0-202.212.aikido.118 Fix: upgrade to 5.15.0-198.208.aikido.116
|
| Root:Ubuntu:22.04 | – | rootio-linux |
< 5.15.0-198.208.aikido.116 < 5.15.0-202.212.aikido.118 Fix: upgrade to 5.15.0-198.208.aikido.116
|
| Ubuntu:24.04:LTS | canonical | linux-vmware | All versions |
| Linux | linux | kernel |
>= 6.19.0, < 7.1.4 Fix: upgrade to 7.1.4
|
| Ubuntu:24.04:LTS | canonical | linux |
< 6.8.0-147.147 Fix: upgrade to 6.8.0-147.147
|
| Ubuntu:24.04:LTS | canonical | linux-aws |
< 6.8.0-1067.70 Fix: upgrade to 6.8.0-1067.70
|
| Ubuntu:24.04:LTS | canonical | linux-azure |
< 6.8.0-1071.79 Fix: upgrade to 6.8.0-1071.79
|
| Ubuntu:24.04:LTS | canonical | linux-azure-fde |
< 6.8.0-1069.76 Fix: upgrade to 6.8.0-1069.76
|
| Ubuntu:24.04:LTS | canonical | linux-gcp |
< 6.8.0-1071.79 Fix: upgrade to 6.8.0-1071.79
|
| Ubuntu:24.04:LTS | canonical | linux-gke |
< 6.8.0-1066.74 Fix: upgrade to 6.8.0-1066.74
|
| Ubuntu:24.04:LTS | canonical | linux-gkeop |
< 6.8.0-1052.56 Fix: upgrade to 6.8.0-1052.56
|
| Ubuntu:24.04:LTS | canonical | linux-ibm |
< 6.8.0-1067.68 Fix: upgrade to 6.8.0-1067.68
|
| Ubuntu:24.04:LTS | canonical | linux-lowlatency |
< 6.8.0-147.147.1 Fix: upgrade to 6.8.0-147.147.1
|
| Ubuntu:24.04:LTS | canonical | linux-oracle |
< 6.8.0-1064.67 Fix: upgrade to 6.8.0-1064.67
|
| Ubuntu:Nvidia-BlueField:24.04:LTS | canonical | linux-bluefield |
< 6.8.0-1033.38 Fix: upgrade to 6.8.0-1033.38
|
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime |
< 6.8.1-1062.63 Fix: upgrade to 6.8.1-1062.63
|
| 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
|
| 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
|
| 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
|
| 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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| Ubuntu:26.04:LTS | canonical | linux-azure-fde |
< 7.0.0-1013.13 Fix: upgrade to 7.0.0-1013.13
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Original advisory text
CVE-2026-64508 in linux - Patched by Root
In the Linux kernel, the following vulnerability has been resolved: bpf: Support for hardening against JIT spraying The BPF JIT allocator packs many small programs into larger executable allocations and reuses space within those allocations as programs are loaded and freed. When fresh code is written into space that a previous program occupied, an indirect jump into the new program can reuse a branch prediction left behind by the old one. Flush the indirect branch predictors before reusing JIT memory so that indirect jumps into a newly written program don't reuse predictions from an old program that occupied the same space. Introduce bpf_arch_pred_flush_enabled static key and bpf_arch_pred_flush static call for flushing the branch predictors on JIT memory reuse. Architectures that need a flush, can update it to a predictor flush function. By default, its a NOP and does not emit any CALL. Allocations larger than a pack are not covered by this flush. That is safe because cBPF programs (the unprivileged attack surface) are bounded well below a pack size. Issue a warning if this assumption is ever violated while the flush is active.
References
- https://security-tracker.debian.org/tracker/CVE-2026-64508 Vendor Advisory
- https://ubuntu.com/security/CVE-2026-64508 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-64508 Third Party Advisory
- https://git.kernel.org/linus/96cce16e26dd02a8678f1e87f88a4b5cdb63b995 Third Party Advisory
- https://git.kernel.org/stable/c/96cce16e26dd02a8678f1e87f88a4b5cdb63b995
- https://git.kernel.org/stable/c/eed774da601268dae674e14d54a15e3624691f52
- https://ubuntu.com/security/notices/USN-8726-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8727-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8728-1 Vendor Advisory
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64508... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-64508 Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Product
- 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/1fbafd5235ca897b322161659ebe8ba651b00b3b
- https://ubuntu.com/security/notices/USN-8760-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8726-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8726-3 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8800-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8760-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8728-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8728-3 Vendor Advisory
- https://docs.bell-sw.com/security/cves/CVE-2026-64508 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8726-4 Vendor Advisory
- https://git.kernel.org/stable/c/6e52c240c43a601b681e3a4e58fc5685114d4726
- https://git.kernel.org/stable/c/7a6c171c6a1ac6d1509752dac131d941a3de0b37
- https://git.kernel.org/stable/c/8ff183ee4d8c452960df58175a094828c0513b2e
Severity
6.3
Medium
Timeline
Published25 Jul 2026
Updated4 Nov 2026
First seen25 Jul 2026
Sources
DEBIAN-CVE-2026-64508 · OSV
CVE-2026-64508 · NVD
CVE-2026-64508 · MITRE
UBUNTU-CVE-2026-64508 · OSV
BELL-CVE-2026-64508 · OSV
CVE-2026-64508 · OSV
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