CVE-2023-38431
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.15% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 66.9% of scored records. A rank, not a probability.
- NVD base score
- 9.1 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2023-07-17 00:00Z3 YR AGO
- Last updated
- 2024-08-02 17:39Z2 YR AGO
- Reserved
- 2023-07-17
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-125Out-of-bounds ReadBase
- Data version
- 5.1
- Document digest
- 789d679135c247aca995153a7e633108aaa6c9a6ba113d125c5e48b75a834be8
05 Affected products
06 References
07 Fixed in
Debian 12
- linux Fixed in 6.1.37-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- linux Fixed in 6.3.11-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- linux Fixed in 6.3.11-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- linux-hwe-edge No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- linux-aws-5.0 No fix yet
- linux-aws-5.3 No fix yet
- linux-azure No fix yet
- linux-azure-5.3 No fix yet
- linux-azure-edge No fix yet
- linux-gcp No fix yet
- linux-gcp-5.3 No fix yet
- linux-gke-4.15 No fix yet
- linux-gke-5.4 No fix yet
- linux-gkeop-5.4 No fix yet
- linux-hwe No fix yet
- linux-oem No fix yet
- linux-oracle-5.0 No fix yet
- linux-oracle-5.3 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- linux-aws-5.11 No fix yet
- linux-aws-5.13 No fix yet
- linux-aws-5.15 Fixed in 5.15.0-1057.63~20.04.1
- linux-aws-5.8 No fix yet
- linux-azure-5.11 No fix yet
- linux-azure-5.13 No fix yet
- linux-azure-5.15 Fixed in 5.15.0-1060.69~20.04.1
- linux-azure-5.8 No fix yet
- linux-gcp-5.11 No fix yet
- linux-gcp-5.13 No fix yet
- linux-gcp-5.15 Fixed in 5.15.0-1055.63~20.04.1
- linux-gcp-5.8 No fix yet
- linux-gke-5.15 No fix yet
- linux-gkeop-5.15 Fixed in 5.15.0-1040.46~20.04.1
- linux-hwe-5.11 No fix yet
- linux-hwe-5.13 No fix yet
- linux-hwe-5.15 Fixed in 5.15.0-102.112~20.04.1
- linux-hwe-5.8 No fix yet
- linux-ibm-5.15 Fixed in 5.15.0-1050.53~20.04.1
- linux-intel-5.13 No fix yet
- linux-intel-iotg-5.15 Fixed in 5.15.0-1052.58~20.04.1
- linux-lowlatency-hwe-5.15 Fixed in 5.15.0-102.112~20.04.1
- linux-nvidia-tegra-5.15 Fixed in 5.15.0-1025.25~20.04.1
- linux-oem-5.10 No fix yet
- linux-oem-5.13 No fix yet
- linux-oem-5.14 No fix yet
- linux-oem-5.6 No fix yet
- linux-oracle-5.11 No fix yet
- linux-oracle-5.13 No fix yet
- linux-oracle-5.15 Fixed in 5.15.0-1055.61~20.04.1
- linux-oracle-5.8 No fix yet
- linux-raspi2 No fix yet
- linux-riscv No fix yet
- linux-riscv-5.11 No fix yet
- linux-riscv-5.15 Fixed in 5.15.0-1053.57~20.04.1
- linux-riscv-5.8 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- linux Fixed in 5.15.0-102.112
- linux-allwinner-5.19 No fix yet
- linux-aws Fixed in 5.15.0-1057.63
- linux-aws-5.19 No fix yet
- linux-aws-6.2 Fixed in 6.2.0-1013.13~22.04.1
- linux-azure Fixed in 5.15.0-1060.69
- linux-azure-5.19 No fix yet
- linux-azure-6.2 Fixed in 6.2.0-1014.14~22.04.1
- linux-azure-fde Fixed in 5.15.0-1060.69.1
- linux-azure-fde-5.19 No fix yet
- linux-gcp Fixed in 5.15.0-1055.63
- linux-gcp-5.19 No fix yet
- linux-gcp-6.2 Fixed in 6.2.0-1016.18~22.04.1
- linux-gke Fixed in 5.15.0-1054.59
- linux-gkeop Fixed in 5.15.0-1040.46
- linux-hwe-5.19 No fix yet
- linux-hwe-6.2 Fixed in 6.2.0-34.34~22.04.1
- linux-ibm Fixed in 5.15.0-1050.53
- linux-intel-iotg Fixed in 5.15.0-1052.58
- linux-kvm Fixed in 5.15.0-1054.59
- linux-lowlatency Fixed in 5.15.0-102.112
- linux-lowlatency-hwe-5.19 No fix yet
- linux-lowlatency-hwe-6.2 Fixed in 6.2.0-1014.14~22.04.1
- linux-nvidia Fixed in 5.15.0-1048.48
- linux-nvidia-6.2 Fixed in 6.2.0-1011.11
- linux-nvidia-tegra Fixed in 5.15.0-1025.25
- linux-nvidia-tegra-igx Fixed in 5.15.0-1012.12
- linux-oem-5.17 No fix yet
- linux-oem-6.0 No fix yet
- linux-oem-6.1 Fixed in 6.1.0-1016.16
- linux-oracle Fixed in 5.15.0-1055.61
- linux-raspi Fixed in 5.15.0-1050.53
- linux-realtime No fix yet
- linux-riscv No fix yet
- linux-riscv-5.19 No fix yet
- linux-starfive-5.19 No fix yet
- linux-xilinx-zynqmp Fixed in 5.15.0-1030.34
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- linux-raspi-realtime No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Nvidia-BlueField 22.04 LTS
- linux-bluefield Fixed in 5.15.0-1040.42
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-preview 22.04 LTS
- linux-aws-fips No fix yet
- linux-azure-fips No fix yet
- linux-fips No fix yet
- linux-gcp-fips No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro FIPS-updates 22.04 LTS
- linux-aws-fips Fixed in 5.15.0-1057.63+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-azure-fips Fixed in 5.15.0-1060.69+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-fips Fixed in 5.15.0-102.112+fips1Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-gcp-fips Fixed in 5.15.0-1055.63+fips2Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro Realtime 22.04 LTS
- linux-intel-iot-realtime Fixed in 5.15.0-1050.52Available with Ubuntu Pro: https://ubuntu.com/pro
- linux-realtime Fixed in 5.15.0-1058.66Available with Ubuntu Pro: https://ubuntu.com/pro
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.