CVE-2023-4458 Kernel: ksmbd: smb2_open out-of-bounds read information disclosure vulnerability

What is CVE-2023-4458?

CVE-2023-4458 is a medium-severity vulnerability in Linux kernel, published on 14 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 extended attributes 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-2023-4458?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-4458?

Apply the vendor's patch.

Is CVE-2023-4458 being exploited?

There is no known exploitation of CVE-2023-4458 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-2023-4458, DEBIAN-CVE-2023-4458, GHSA-gqjr-4mgj-g55g, UBUNTU-CVE-2023-4458.