Description
An issue was discovered in the Linux kernel before 6.3.10. fs/smb/server/smb2misc.c in ksmbd does not validate the relationship between the command payload size and the RFC1002 length specification, leading to an out-of-bounds read.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 6.3.11-1 | — |
| Debian 13 | linux | 6.3.11-1 | — |
| Debian 12 | linux | 6.1.37-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Nvidia-BlueField 22.04 LTS | linux-bluefield | 5.15.0-1027.29 | — |
| Ubuntu 24.04 LTS | linux-raspi-realtime | No fix yet | — |
| Ubuntu 22.04 LTS | linux | 5.15.0-86.96 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws | 5.15.0-1047.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-aws-6.2 | 6.2.0-1015.15~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-azure | 5.15.0-1049.56 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-6.2 +1 | 6.2.0-1016.16~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-azure-fde | 5.15.0-1049.56.1 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-azure-fde-6.2 | 6.2.0-1016.16~22.04.1.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-gcp | 5.15.0-1044.52 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gcp-6.2 | 6.2.0-1018.20~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-gke +1 | 5.15.0-1044.49 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-gkeop | 5.15.0-1030.35 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-hwe-6.2 | 6.2.0-36.37~22.04.1 | USN-6464-1 |
| Ubuntu 22.04 LTS | linux-ibm +1 | 5.15.0-1040.43 | USN-6416-3, USN-6416-1 |
| Ubuntu 22.04 LTS | linux-intel-iotg | 5.15.0-1043.49 | USN-6445-1 |
| Ubuntu 22.04 LTS | linux-lowlatency | 5.15.0-86.95 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia | 5.15.0-1037.37 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-nvidia-6.2 | 6.2.0-1011.11 | USN-6466-1 |
| Ubuntu 22.04 LTS | linux-nvidia-tegra | 5.15.0-1018.18 | — |
| Ubuntu 22.04 LTS | linux-nvidia-tegra-igx | 5.15.0-1005.5 | — |
| Ubuntu 22.04 LTS | linux-oem-6.1 | 6.1.0-1019.19 | USN-6285-1 |
| Ubuntu 22.04 LTS | linux-oracle | 5.15.0-1045.51 | USN-6416-1 |
| Ubuntu 22.04 LTS | linux-riscv +12 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-starfive-6.2 | 6.2.0-1009.10~22.04.1 | USN-6520-1 |
| Ubuntu 22.04 LTS | linux-xilinx-zynqmp | 5.15.0-1025.29 | — |
| Ubuntu 20.04 LTS | linux-aws-5.15 | 5.15.0-1047.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-5.15 | 5.15.0-1049.56~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-azure-fde-5.15 | 5.15.0-1049.56~20.04.1.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gcp-5.15 | 5.15.0-1044.52~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-gkeop-5.15 | 5.15.0-1030.35~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-hwe-5.15 | 5.15.0-86.96~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-ibm-5.15 | 5.15.0-1040.43~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-intel-iotg-5.15 | 5.15.0-1043.49~20.04.1 | USN-6445-2 |
| Ubuntu 20.04 LTS | linux-lowlatency-hwe-5.15 | 5.15.0-86.95~20.04.1 | USN-6416-1 |
| Ubuntu 20.04 LTS | linux-nvidia-tegra-5.15 | 5.15.0-1018.18~20.04.1 | — |
| Ubuntu 20.04 LTS | linux-oracle-5.15 | 5.15.0-1045.51~20.04.1 | USN-6416-2 |
| Ubuntu 20.04 LTS | linux-riscv +24 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-riscv-5.15 | 5.15.0-1043.47~20.04.1 | — |
| Ubuntu 18.04 LTS | linux-gcp +12 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | linux-hwe-edge | No fix yet | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-intel-iot-realtime | 5.15.0-1040.42 | — |
| Ubuntu Pro Realtime 22.04 LTS | linux-realtime | 5.15.0-1048.54 | — |
| Ubuntu Pro FIPS-preview 22.04 LTS | linux-fips | No fix yet | — |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | hyperv-daemons | 5.15.122.1-1 | — |
| Azure Linux 2 (CBL-Mariner) | kernel | 5.15.122.1-2 | — |
Advisories 10
- USN-6416-1 linux, linux-aws, linux-aws-5.15, linux-azure, linux-azure-5.15, linux-azure-fde, linux-azure-fde-5.15, linux-gcp, linux-gcp-5.15, linux-gke, linux-gkeop, linux-gkeop-5.15, linux-ibm, linux-ibm-5.15, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-5.15, linux-nvidia, linux-oracle vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6464-1 linux, linux-aws, linux-aws-6.2, linux-azure, linux-azure-6.2, linux-azure-fde-6.2, linux-gcp, linux-gcp-6.2, linux-hwe-6.2, linux-kvm, linux-lowlatency, linux-lowlatency-hwe-6.2, linux-oracle, linux-raspi, linux-starfive vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-2 linux-hwe-5.15, linux-oracle-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-1 linux-intel-iotg vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6466-1 linux-nvidia-6.2 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6445-2 linux-intel-iotg-5.15 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6416-3 linux-raspi vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6520-1 linux-starfive-6.2 vulnerabilities Ubuntu Security Notices (USN) · Nov 3, 2026
- USN-6285-1 linux-oem-6.1 vulnerabilities Ubuntu Security Notices (USN) · Oct 22, 2026
- WID-SEC-2023-1764 Linux Kernel: Schwachstelle ermöglicht Offenlegung von Informationen BSI CERT-Bund (WID) · Nov 28, 2023