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6.8
CVE-2025-38544: Linux kernel RxRPC preallocation can cause server crash
CVE-2025-38544 · published 1 year ago
Summary
The Linux kernel’s RxRPC component may mishandle pre‑allocated call IDs, leading to an error that can crash a server using AF_RXRPC. This affects Linux kernel deployments on Azure, AWS, GCP, and standard Ubuntu HWE installations. Update the kernel to the latest patched version to prevent the crash.
What to do
- Update canonical linux-aws-6.8 to version 6.8.0-1046.49~22.04.1.
- Update canonical linux-azure-6.8 to version 6.8.0-1051.57~22.04.1.
- Update canonical linux-gcp-6.8 to version 6.8.0-1047.50~22.04.2.
- Update canonical linux-hwe-6.8 to version 6.8.0-100.100~22.04.1.
- Update canonical linux-ibm-6.8 to version 6.8.0-1044.44~22.04.1.
- Update canonical linux-lowlatency-hwe-6.8 to version 6.8.0-100.100.1~22.04.1.
- Update canonical linux-nvidia-6.8 to version 6.8.0-1046.49~22.04.1.
- Update canonical linux-oracle-6.8 to version 6.8.0-1043.44~22.04.1.
- Update canonical linux-riscv-6.8 to version 6.8.0-100.100~22.04.1.
- Update canonical linux-realtime-6.8 to version 6.8.1-1041.42~22.04.1.
- Update canonical linux to version 6.8.0-100.100.
- Update canonical linux-aws to version 6.8.0-1046.49.
- Update canonical linux-aws-6.14 to version 6.14.0-1017.17~24.04.1.
- Update canonical linux-azure to version 6.8.0-1046.52.
- Update canonical linux-azure-6.14 to version 6.14.0-1017.17~24.04.1.
- Update canonical linux-gcp to version 6.8.0-1047.50.
- Update canonical linux-gcp-6.14 to version 6.14.0-1020.21~24.04.1.
- Update canonical linux-gke to version 6.8.0-1043.48.
- Update canonical linux-gkeop to version 6.8.0-1030.33.
- Update canonical linux-ibm to version 6.8.0-1044.44.
- Update canonical linux-lowlatency to version 6.8.0-100.100.1.
- Update canonical linux-nvidia to version 6.8.0-1046.49.
- Update canonical linux-nvidia-lowlatency to version 6.8.0-1046.49.1.
- Update canonical linux-nvidia-tegra to version 6.8.0-1020.20.
- Update canonical linux-oem-6.14 to version 6.14.0-1016.16.
- Update canonical linux-oracle to version 6.8.0-1043.44.
- Update canonical linux-oracle-6.14 to version 6.14.0-1017.17~24.04.1.
- Update canonical linux-raspi to version 6.8.0-1047.51.
- Update canonical linux-riscv-6.14 to version 6.14.0-36.36.1~24.04.1.
- Update canonical linux-xilinx to version 6.8.0-1023.24.
- Update canonical linux-aws-fips to version 6.8.0-1046.49+fips1.
- Update canonical linux-azure-fips to version 6.8.0-1046.52+fips1.
- Update canonical linux-fips to version 6.8.0-100.100+fips1.
- Update canonical linux-gcp-fips to version 6.8.0-1047.50+fips1.
- Update canonical linux-raspi-realtime to version 6.8.0-2037.38.
- Update canonical linux-realtime to version 6.8.1-1041.42.
- Update canonical linux-realtime-6.14 to version 6.14.0-1016.16~24.04.1.
- Update debian rootio-linux to version 5.10.247-1.root.io.42.
- Update debian rootio-linux to version 5.10.251-1.root.io.61.
- Update debian rootio-linux to version 6.1.159-1.root.io.75.
- Update canonical rootio-linux to version 5.15.0-186.196.root.io.103.
- Update canonical linux to version 5.15.0-187.197.aikido.112.
- Update canonical rootio-linux to version 5.15.0-187.197.aikido.112.
- Update canonical rootio-linux to version 6.8.0-117.117.root.io.68.
- Update canonical rootio-linux to version 6.8.0-124.124.root.io.70.
- Update canonical rootio-linux to version 6.8.0-124.124.root.io.71.
- Update canonical rootio-linux to version 6.8.0-124.124.root.io.73.
- Update canonical rootio-linux to version 6.8.0-134.134.root.io.79.
- Update canonical rootio-linux to version 6.8.0-134.134.root.io.80.
- Update canonical rootio-linux to version 6.8.0-136.136.root.io.82.
- Update canonical rootio-linux to version 6.8.0-136.136.root.io.83.
- Update canonical linux-bluefield to version 6.8.0-1016.20.
- 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 to version 6.8.0-146.146.aikido.89.
- Update rootio-linux to version 6.8.0-146.146.aikido.89.
- Update canonical linux-azure-fde-6.8 to version 6.8.0-1046.53~22.04.1.
- Update canonical linux-azure-fde to version 6.8.0-1046.53.
- Update linux to version 6.8.0-147.147.aikido.90.
- Update rootio-linux to version 6.8.0-147.147.aikido.90.
- Update linux kernel to version 6.15.7.
- Update linux to version 6.1.190-1.aikido.167.
- Update rootio-linux to version 6.1.190-1.aikido.167.
- Update linux to version 5.15.0-202.212.aikido.118.
- Update rootio-linux to version 5.15.0-202.212.aikido.118.
- Update debian linux to version 6.12.41-1.
- Update debian linux to version 6.16.3-1.
- Update bellsoft linux-lts to version 6.1.191-r0.
- Update bellsoft linux-lts to version 6.12.41-r0.
- Update bellsoft linux-lts to version 6.18.35-r1.
- Update linux linux to version 3838acfc347b803b66a2c8eb510da1c489d44ca1 or later.
Affected software
| Ecosystem | Vendor | Product | Affected versions |
|---|---|---|---|
| – | linux | linux_kernel |
>= 4.9, < 6.6.99 >= 6.7, < 6.12.39 >= 6.13, < 6.15.7 6.16 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* |
| Ubuntu:Pro:14.04:LTS | canonical | linux-azure | 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-oracle | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux | All versions |
| Ubuntu:Pro:18.04:LTS | canonical | linux-aws | 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:Pro:18.04:LTS | canonical | linux-kvm | 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-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-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 |
| Ubuntu:20.04:LTS | canonical | linux-gke-5.15 | All versions |
Showing 50 of 187. Show the rest
| Ecosystem | Vendor | Product | Affected 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 |
< 6.8.0-1046.49~22.04.1 Fix: upgrade to 6.8.0-1046.49~22.04.1
|
| 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 |
< 6.8.0-1051.57~22.04.1 Fix: upgrade to 6.8.0-1051.57~22.04.1
|
| 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 |
< 6.8.0-1046.53~22.04.1 Fix: upgrade to 6.8.0-1046.53~22.04.1
|
| 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 |
< 6.8.0-1047.50~22.04.2 Fix: upgrade to 6.8.0-1047.50~22.04.2
|
| 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 |
< 6.8.0-100.100~22.04.1 Fix: upgrade to 6.8.0-100.100~22.04.1
|
| Ubuntu:22.04:LTS | canonical | linux-ibm-6.8 |
< 6.8.0-1044.44~22.04.1 Fix: upgrade to 6.8.0-1044.44~22.04.1
|
| 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 |
< 6.8.0-100.100.1~22.04.1 Fix: upgrade to 6.8.0-100.100.1~22.04.1
|
| 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 |
< 6.8.0-1046.49~22.04.1 Fix: upgrade to 6.8.0-1046.49~22.04.1
|
| 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 |
< 6.8.0-1043.44~22.04.1 Fix: upgrade to 6.8.0-1043.44~22.04.1
|
| 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 |
< 6.8.0-100.100~22.04.1 Fix: upgrade to 6.8.0-100.100~22.04.1
|
| 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 |
< 6.8.1-1041.42~22.04.1 Fix: upgrade to 6.8.1-1041.42~22.04.1
|
| Ubuntu:24.04:LTS | canonical | linux |
< 6.8.0-100.100 Fix: upgrade to 6.8.0-100.100
|
| Ubuntu:24.04:LTS | canonical | linux-aws |
< 6.8.0-1046.49 Fix: upgrade to 6.8.0-1046.49
|
| Ubuntu:24.04:LTS | canonical | linux-aws-6.14 |
< 6.14.0-1017.17~24.04.1 Fix: upgrade to 6.14.0-1017.17~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-azure |
< 6.8.0-1046.52 Fix: upgrade to 6.8.0-1046.52
|
| Ubuntu:24.04:LTS | canonical | linux-azure-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-6.14 |
< 6.14.0-1017.17~24.04.1 Fix: upgrade to 6.14.0-1017.17~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-azure-fde-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-nvidia | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-nvidia-6.14 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp |
< 6.8.0-1047.50 Fix: upgrade to 6.8.0-1047.50
|
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-gcp-6.14 |
< 6.14.0-1020.21~24.04.1 Fix: upgrade to 6.14.0-1020.21~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-gke |
< 6.8.0-1043.48 Fix: upgrade to 6.8.0-1043.48
|
| Ubuntu:24.04:LTS | canonical | linux-gkeop |
< 6.8.0-1030.33 Fix: upgrade to 6.8.0-1030.33
|
| Ubuntu:24.04:LTS | canonical | linux-hwe-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-ibm |
< 6.8.0-1044.44 Fix: upgrade to 6.8.0-1044.44
|
| Ubuntu:24.04:LTS | canonical | linux-intel | All versions |
| Ubuntu:24.04:LTS | canonical | linux-lowlatency |
< 6.8.0-100.100.1 Fix: upgrade to 6.8.0-100.100.1
|
| Ubuntu:24.04:LTS | canonical | linux-lowlatency-hwe-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia |
< 6.8.0-1046.49 Fix: upgrade to 6.8.0-1046.49
|
| Ubuntu:24.04:LTS | canonical | linux-nvidia-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-nvidia-lowlatency |
< 6.8.0-1046.49.1 Fix: upgrade to 6.8.0-1046.49.1
|
| Ubuntu:24.04:LTS | canonical | linux-nvidia-tegra |
< 6.8.0-1020.20 Fix: upgrade to 6.8.0-1020.20
|
| Ubuntu:24.04:LTS | canonical | linux-oem-6.11 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oem-6.14 |
< 6.14.0-1016.16 Fix: upgrade to 6.14.0-1016.16
|
| Ubuntu:24.04:LTS | canonical | linux-oem-6.8 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-oracle |
< 6.8.0-1043.44 Fix: upgrade to 6.8.0-1043.44
|
| Ubuntu:24.04:LTS | canonical | linux-oracle-6.14 |
< 6.14.0-1017.17~24.04.1 Fix: upgrade to 6.14.0-1017.17~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-raspi |
< 6.8.0-1047.51 Fix: upgrade to 6.8.0-1047.51
|
| Ubuntu:24.04:LTS | canonical | linux-raspi-realtime | All versions |
| Ubuntu:24.04:LTS | canonical | linux-riscv-6.14 |
< 6.14.0-36.36.1~24.04.1 Fix: upgrade to 6.14.0-36.36.1~24.04.1
|
| Ubuntu:24.04:LTS | canonical | linux-xilinx |
< 6.8.0-1023.24 Fix: upgrade to 6.8.0-1023.24
|
| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-aws-fips |
< 6.8.0-1046.49+fips1 Fix: upgrade to 6.8.0-1046.49+fips1
|
| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-azure-fips |
< 6.8.0-1046.52+fips1 Fix: upgrade to 6.8.0-1046.52+fips1
|
| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-fips |
< 6.8.0-100.100+fips1 Fix: upgrade to 6.8.0-100.100+fips1
|
| Ubuntu:Pro:FIPS-updates:24.04:LTS | canonical | linux-gcp-fips |
< 6.8.0-1047.50+fips1 Fix: upgrade to 6.8.0-1047.50+fips1
|
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-raspi-realtime |
< 6.8.0-2037.38 Fix: upgrade to 6.8.0-2037.38
|
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime |
< 6.8.1-1041.42 Fix: upgrade to 6.8.1-1041.42
|
| Ubuntu:Pro:Realtime:24.04:LTS | canonical | linux-realtime-6.14 |
< 6.14.0-1016.16~24.04.1 Fix: upgrade to 6.14.0-1016.16~24.04.1
|
| Root:Debian:11 | debian | rootio-linux |
< 5.10.247-1.root.io.42 < 5.10.251-1.root.io.61 Fix: upgrade to 5.10.247-1.root.io.42
|
| Root:Debian:12 | debian | rootio-linux |
< 6.1.159-1.root.io.75 Fix: upgrade to 6.1.159-1.root.io.75
|
| Root:Ubuntu:22.04 | canonical | rootio-linux |
< 5.15.0-186.196.root.io.103 < 5.15.0-187.197.aikido.112 Fix: upgrade to 5.15.0-186.196.root.io.103
|
| Root:Ubuntu:22.04 | canonical | linux |
< 5.15.0-187.197.aikido.112 Fix: upgrade to 5.15.0-187.197.aikido.112
|
| Root:Ubuntu:24.04 | canonical | rootio-linux |
< 6.8.0-117.117.root.io.68 < 6.8.0-124.124.root.io.70 < 6.8.0-124.124.root.io.71 < 6.8.0-124.124.root.io.73 < 6.8.0-134.134.root.io.79 < 6.8.0-134.134.root.io.80 < 6.8.0-136.136.root.io.82 < 6.8.0-136.136.root.io.83 Fix: upgrade to 6.8.0-117.117.root.io.68
|
| Ubuntu:Nvidia-BlueField:24.04:LTS | canonical | linux-bluefield |
< 6.8.0-1016.20 Fix: upgrade to 6.8.0-1016.20
|
| 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
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| Root:Ubuntu:24.04 | – | linux |
< 6.8.0-146.146.aikido.89 < 6.8.0-147.147.aikido.90 Fix: upgrade to 6.8.0-146.146.aikido.89
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| Root:Ubuntu:24.04 | – | rootio-linux |
< 6.8.0-146.146.aikido.89 < 6.8.0-147.147.aikido.90 Fix: upgrade to 6.8.0-146.146.aikido.89
|
| Ubuntu:Pro:20.04:LTS | canonical | linux-azure-fde-5.15 | All versions |
| Ubuntu:24.04:LTS | canonical | linux-azure-fde |
< 6.8.0-1046.53 Fix: upgrade to 6.8.0-1046.53
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| Linux | linux | kernel |
>= 6.13.0, < 6.15.7 Fix: upgrade to 6.15.7
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| Root:Debian:12 | – | linux |
< 6.1.190-1.aikido.167 Fix: upgrade to 6.1.190-1.aikido.167
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| Root:Debian:12 | – | rootio-linux |
< 6.1.190-1.aikido.167 Fix: upgrade to 6.1.190-1.aikido.167
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| – | linux | linux |
< 3838acfc347b803b66a2c8eb510da1c489d44ca1 4.9 |
| Debian:12 | debian | linux | All versions |
| Debian:13 | debian | linux |
< 6.12.41-1 Fix: upgrade to 6.12.41-1
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| Debian:14 | debian | linux |
< 6.16.3-1 Fix: upgrade to 6.16.3-1
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| Alpaquita:23 | bellsoft | linux-lts |
>= 6.1.189-r0, < 6.1.191-r0 Fix: upgrade to 6.1.191-r0
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| Alpaquita:25 | bellsoft | linux-lts |
>= 6.6.89-r0, < 6.12.41-r0 Fix: upgrade to 6.12.41-r0
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| Alpaquita:stream | bellsoft | linux-lts |
>= 6.12.92-r1, < 6.18.35-r1 Fix: upgrade to 6.18.35-r1
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Original advisory text
BELL-CVE-2025-38544
In the Linux kernel, the following vulnerability has been resolved:
rxrpc: Fix bug due to prealloc collision
When userspace is using AF_RXRPC to provide a server, it has to preallocate
incoming calls and assign to them call IDs that will be used to thread
related recvmsg() and sendmsg() together. The preallocated call IDs will
automatically be attached to calls as they come in until the pool is empty.
To the kernel, the call IDs are just arbitrary numbers, but userspace can
use the call ID to hold a pointer to prepared structs. In any case, the
user isn't permitted to create two calls with the same call ID (call IDs
become available again when the call ends) and EBADSLT should result from
sendmsg() if an attempt is made to preallocate a call with an in-use call
ID.
However, the cleanup in the error handling will trigger both assertions in
rxrpc_cleanup_call() because the call isn't marked complete and isn't
marked as having been released.
Fix this by setting the call state in rxrpc_service_prealloc_one() and then
marking it as being released before calling the cleanup function.
rxrpc: Fix bug due to prealloc collision
When userspace is using AF_RXRPC to provide a server, it has to preallocate
incoming calls and assign to them call IDs that will be used to thread
related recvmsg() and sendmsg() together. The preallocated call IDs will
automatically be attached to calls as they come in until the pool is empty.
To the kernel, the call IDs are just arbitrary numbers, but userspace can
use the call ID to hold a pointer to prepared structs. In any case, the
user isn't permitted to create two calls with the same call ID (call IDs
become available again when the call ends) and EBADSLT should result from
sendmsg() if an attempt is made to preallocate a call with an in-use call
ID.
However, the cleanup in the error handling will trigger both assertions in
rxrpc_cleanup_call() because the call isn't marked complete and isn't
marked as having been released.
Fix this by setting the call state in rxrpc_service_prealloc_one() and then
marking it as being released before calling the cleanup function.
References
- https://ubuntu.com/security/CVE-2025-38544 Third Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2025-38544 Third Party Advisory
- https://git.kernel.org/linus/69e4186773c6445b258fb45b6e1df18df831ec45 Third Party Advisory
- https://ubuntu.com/security/notices/USN-7879-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8052-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-7 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-8 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8052-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8074-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8074-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8126-1 Vendor Advisory
- https://git.kernel.org/stable/c/3838acfc347b803b66a2c8eb510da1c489d44ca1 URL
- https://git.kernel.org/stable/c/432c5363cd6fe5a928bbc94524d28b05515684dd URL
- https://git.kernel.org/stable/c/5385ad53793de2ab11e396bdcdaa65bb04b4dad6 URL
- https://ubuntu.com/security/notices/USN-7879-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-7880-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-7879-3 Vendor Advisory
- https://ubuntu.com/security/notices/USN-7879-4 Vendor Advisory
- https://ubuntu.com/security/notices/USN-7934-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8031-1 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-3 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-4 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-5 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8031-2 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8028-6 Vendor Advisory
- https://ubuntu.com/security/notices/USN-8031-3 Vendor Advisory
- https://git.kernel.org/stable/c/69e4186773c6445b258fb45b6e1df18df831ec45 URL
- https://git.kernel.org/stable/c/d8ffb47a443919277cb093c3db1ec6c0a06880b1 URL
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38544... Vendor Advisory
- https://security-tracker.debian.org/tracker/CVE-2025-38544 Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2025-38544 Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git Product
- https://docs.bell-sw.com/security/cves/CVE-2025-38544 Vendor Advisory
Internet-facing
60 days
Internal
At next upgrade
- Not known to be exploited
- Needs hands-on effort to exploit (estimated)
- Gives an attacker partial control (estimated)
Severity
6.8
Medium
Type
CWE-617Reachable Assertion
Timeline
Published19 Aug 2025
Updated4 Nov 2026
First seen7 Mar 2026
Sources
CVE-2025-38544 · NVD
UBUNTU-CVE-2025-38544 · OSV
CVE-2025-38544 · OSV
CVE-2025-38544 · MITRE
DEBIAN-CVE-2025-38544 · OSV
BELL-CVE-2025-38544 · OSV
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