critical
CVE-2023-38431
An issue was discovered in the Linux kernel before 6.3.8. fs/smb/serve ...
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Trivy's own label is CRITICAL. Rated critical by NVD, CBL-Mariner, Photon OS. Rated lower by Ubuntu (high).
Description
An issue was discovered in the Linux kernel before 6.3.8. fs/smb/server/connection.c in ksmbd does not validate the relationship between the NetBIOS header's length field and the SMB header sizes, via pdu_size in ksmbd_conn_handler_loop, leading to an out-of-bounds read.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| CBL-Mariner 1.0 | kernel | 0:5.10.188.1-1.cm1 |
| CBL-Mariner 2.0 | kernel | 0:5.15.122.1-2.cm2 |
| Photon OS 5.0 | bpftool, linux, linux-devel and 5 more | 6.1.37-1.ph5 |
| debian 12 | linux | 6.1.37-1 |
| debian 13 | linux | 6.3.11-1 |
| debian 14 | linux | 6.3.11-1 |
| echo | linux | 6.1.37-1 |
| root.io debian 12 | rootio-linux | 6.1.37-1 |
| root.io debian 13 | rootio-linux | 6.3.11-1 |
| root.io ubuntu 22.04 | rootio-linux | 5.15.0-102.112 |
| ubuntu 20.04 | linux-aws-5.15, linux-azure-5.15, linux-gcp-5.15 and 8 more | 5.15.0-1057.63~20.04.1 and 9 more |
| ubuntu 20.04-ESM | linux-aws-5.15, linux-azure-5.15, linux-gcp-5.15 and 8 more | 5.15.0-1057.63~20.04.1 and 9 more |
Show all 75 entries from 14 sources
| Source | Package | Fixed in |
|---|---|---|
| CBL-Mariner 1.0 | kernel | 0:5.10.188.1-1.cm1 |
| CBL-Mariner 2.0 | kernel | 0:5.15.122.1-2.cm2 |
| Photon OS 5.0 | bpftool | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux-devel | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux-docs | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux-drivers-gpu | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux-drivers-sound | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux-python3-perf | 6.1.37-1.ph5 |
| Photon OS 5.0 | linux-tools | 6.1.37-1.ph5 |
| debian 12 | linux | 6.1.37-1 |
| debian 13 | linux | 6.3.11-1 |
| debian 14 | linux | 6.3.11-1 |
| echo | linux | 6.1.37-1 |
| root.io debian 12 | rootio-linux | 6.1.37-1 |
| root.io debian 13 | rootio-linux | 6.3.11-1 |
| root.io ubuntu 22.04 | rootio-linux | 5.15.0-102.112 |
| ubuntu 20.04 | linux-aws-5.15 | 5.15.0-1057.63~20.04.1 |
| ubuntu 20.04 | linux-azure-5.15 | 5.15.0-1060.69~20.04.1 |
| ubuntu 20.04 | linux-gcp-5.15 | 5.15.0-1055.63~20.04.1 |
| ubuntu 20.04 | linux-gkeop-5.15 | 5.15.0-1040.46~20.04.1 |
| ubuntu 20.04 | linux-hwe-5.15 | 5.15.0-102.112~20.04.1 |
| ubuntu 20.04 | linux-ibm-5.15 | 5.15.0-1050.53~20.04.1 |
| ubuntu 20.04 | linux-intel-iotg-5.15 | 5.15.0-1052.58~20.04.1 |
| ubuntu 20.04 | linux-lowlatency-hwe-5.15 | 5.15.0-102.112~20.04.1 |
| ubuntu 20.04 | linux-nvidia-tegra-5.15 | 5.15.0-1025.25~20.04.1 |
| ubuntu 20.04 | linux-oracle-5.15 | 5.15.0-1055.61~20.04.1 |
| ubuntu 20.04 | linux-riscv-5.15 | 5.15.0-1053.57~20.04.1 |
| ubuntu 20.04-ESM | linux-aws-5.15 | 5.15.0-1057.63~20.04.1 |
| ubuntu 20.04-ESM | linux-azure-5.15 | 5.15.0-1060.69~20.04.1 |
| ubuntu 20.04-ESM | linux-gcp-5.15 | 5.15.0-1055.63~20.04.1 |
| ubuntu 20.04-ESM | linux-gkeop-5.15 | 5.15.0-1040.46~20.04.1 |
| ubuntu 20.04-ESM | linux-hwe-5.15 | 5.15.0-102.112~20.04.1 |
| ubuntu 20.04-ESM | linux-ibm-5.15 | 5.15.0-1050.53~20.04.1 |
| ubuntu 20.04-ESM | linux-intel-iotg-5.15 | 5.15.0-1052.58~20.04.1 |
| ubuntu 20.04-ESM | linux-lowlatency-hwe-5.15 | 5.15.0-102.112~20.04.1 |
| ubuntu 20.04-ESM | linux-nvidia-tegra-5.15 | 5.15.0-1025.25~20.04.1 |
| ubuntu 20.04-ESM | linux-oracle-5.15 | 5.15.0-1055.61~20.04.1 |
| ubuntu 20.04-ESM | linux-riscv-5.15 | 5.15.0-1053.57~20.04.1 |
| ubuntu 22.04 | linux | 5.15.0-102.112 |
| ubuntu 22.04 | linux-aws | 5.15.0-1057.63 |
| ubuntu 22.04 | linux-aws-6.2 | 6.2.0-1013.13~22.04.1 |
| ubuntu 22.04 | linux-azure | 5.15.0-1060.69 |
| ubuntu 22.04 | linux-azure-6.2 | 6.2.0-1014.14~22.04.1 |
| ubuntu 22.04 | linux-azure-fde | 5.15.0-1060.69.1 |
| ubuntu 22.04 | linux-azure-fde-6.2 | 6.2.0-1014.14~22.04.1 |
| ubuntu 22.04 | linux-gcp | 5.15.0-1055.63 |
| ubuntu 22.04 | linux-gcp-6.2 | 6.2.0-1016.18~22.04.1 |
| ubuntu 22.04 | linux-gke | 5.15.0-1054.59 |
| ubuntu 22.04 | linux-gkeop | 5.15.0-1040.46 |
| ubuntu 22.04 | linux-hwe-6.2 | 6.2.0-34.34~22.04.1 |
| ubuntu 22.04 | linux-ibm | 5.15.0-1050.53 |
| ubuntu 22.04 | linux-intel-iot-realtime | 5.15.0-1050.52 |
| ubuntu 22.04 | linux-intel-iotg | 5.15.0-1052.58 |
| ubuntu 22.04 | linux-kvm | 5.15.0-1054.59 |
| ubuntu 22.04 | linux-lowlatency | 5.15.0-102.112 |
| ubuntu 22.04 | linux-lowlatency-hwe-6.2 | 6.2.0-1014.14~22.04.1 |
| ubuntu 22.04 | linux-nvidia | 5.15.0-1048.48 |
| ubuntu 22.04 | linux-nvidia-6.2 | 6.2.0-1011.11 |
| ubuntu 22.04 | linux-nvidia-tegra | 5.15.0-1025.25 |
| ubuntu 22.04 | linux-nvidia-tegra-igx | 5.15.0-1012.12 |
| ubuntu 22.04 | linux-oem-6.1 | 6.1.0-1016.16 |
| ubuntu 22.04 | linux-oracle | 5.15.0-1055.61 |
| ubuntu 22.04 | linux-raspi | 5.15.0-1050.53 |
| ubuntu 22.04 | linux-xilinx-zynqmp | 5.15.0-1030.34 |
| ubuntu 23.04 | linux | 6.2.0-34.34 |
| ubuntu 23.04 | linux-aws | 6.2.0-1013.13 |
| ubuntu 23.04 | linux-azure | 6.2.0-1014.14 |
| ubuntu 23.04 | linux-gcp | 6.2.0-1016.18 |
| ubuntu 23.04 | linux-kvm | 6.2.0-1014.14 |
| ubuntu 23.04 | linux-lowlatency | 6.2.0-1014.14 |
| ubuntu 23.04 | linux-oracle | 6.2.0-1013.13 |
| ubuntu 23.04 | linux-raspi | 6.2.0-1014.16 |
| ubuntu 23.04 | linux-riscv | 6.2.0-34.34.1 |
| ubuntu 23.04 | linux-starfive | 6.2.0-1006.7 |
References
- https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3.8
- https://git.kernel.org/linus/368ba06881c395f1c9a7ba22203cf8d78b4addc0%20%286.4-rc6%29
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/fs/smb/server?id=368ba06881c395f1c9a7ba22203cf8d78b4addc0
- https://nvd.nist.gov/vuln/detail/CVE-2023-38431
- https://security.netapp.com/advisory/ntap-20230824-0011/
- https://ubuntu.com/security/notices/USN-6412-1
- https://ubuntu.com/security/notices/USN-6466-1
- https://ubuntu.com/security/notices/USN-6725-1