CVE-2023-53399 ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem()

What is CVE-2023-53399?

CVE-2023-53399 is a high-severity vulnerability in Linux kernel, published on 18 Sep 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

ksmbd: fix NULL pointer dereference in smb2_get_info_filesystem()

If share is , share->path is NULL and it cause NULL pointer dereference issue.

Weakness: CWE-476

Which versions are affected by CVE-2023-53399?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-53399?

Apply the vendor's patch.

Is CVE-2023-53399 being exploited?

There is no known exploitation of CVE-2023-53399 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-2023-53399, DEBIAN-CVE-2023-53399, GHSA-j9f9-83jq-xj75, UBUNTU-CVE-2023-53399.