CVE-2023-38431: Critical severity Linux Linux kernel vulnerability
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 pdusize in ksmbdconnhandlerloop, leading to an out-of-bounds read.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1 - Upgrade
Upgrade
Linux kernel (ksmbd)to a version that resolves this vulnerability.Fixed in 6.3.8
Event History
Frequently Asked Questions
What is the severity of CVE-2023-38431?
CVE-2023-38431 has a high severity rating due to the out-of-bounds read vulnerability in the Linux kernel's ksmbd component.
How do I fix CVE-2023-38431?
To fix CVE-2023-38431, it is recommended to update the Linux kernel to versions 5.15.145, 6.1.34, or 6.3.8 and later.
What versions of the Linux kernel are affected by CVE-2023-38431?
CVE-2023-38431 affects Linux kernel versions before 6.3.8, specifically those in the ranges 5.15.x and 5.16.x to 6.2.x.
Are there any specific products that CVE-2023-38431 affects?
Yes, CVE-2023-38431 also affects various NetApp hardware including the SolidFire & HCI Management Node and the H300s, H410s, H500s, and H700s models.
What is the potential impact of CVE-2023-38431?
The potential impact of CVE-2023-38431 includes unauthorized reading of memory data, which could lead to exposure of sensitive information.