CVE-2023-39176 Kernel: ksmbd: transform header out-of-bounds read information disclosure vulnerability

What is CVE-2023-39176?

CVE-2023-39176 is a medium-severity vulnerability in Linux kernel, published on 18 Nov 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found within the parsing of SMB2 requests that have a transform header in the kernel ksmbd module. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.

Weakness: CWE-125

Which versions are affected by CVE-2023-39176?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-39176?

Apply the vendor's patch.

Is CVE-2023-39176 being exploited?

There is no known exploitation of CVE-2023-39176 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 BELL-CVE-2023-39176, DEBIAN-CVE-2023-39176, GHSA-jf42-2pw2-333x, UBUNTU-CVE-2023-39176.