CVE-2023-38431 Information disclosure in n/a

What is CVE-2023-38431?

CVE-2023-38431 is a critical vulnerability in Linux kernel, published on 17 Jul 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2023-38431?

It affects 6 products.

Products include Linux kernel, Netapp H300s, Netapp H410s, Netapp H500s, Netapp H700s, Netapp Solidfire \& Hci Management Node.

How do I fix CVE-2023-38431?

Apply the vendor's patch.

Is CVE-2023-38431 being exploited?

There is no known exploitation of CVE-2023-38431 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27539, DEBIAN-CVE-2023-38431, GHSA-229r-cp46-m292, UBUNTU-CVE-2023-38431.