CVE-2025-38208 smb: client: add NULL check in automount_fullpath

What is CVE-2025-38208?

CVE-2025-38208 is a medium-severity vulnerability in Linux kernel, published on 4 Jul 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

smb: client: add NULL check in automount_fullpath

page is checked for null in __build_path_from_dentry_optional_prefix when tcon->origin_fullpath is not set. However, the check is missing when it is set. Add a check to prevent a potential NULL pointer dereference.

Weakness: CWE-476

Which versions are affected by CVE-2025-38208?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2025-38208?

Apply the vendor's patch.

Is CVE-2025-38208 being exploited?

There is no known exploitation of CVE-2025-38208 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-64692, AZL-70424, BELL-CVE-2025-38208, DEBIAN-CVE-2025-38208, GHSA-xp37-p5rq-3c53, ROOT-OS-DEBIAN-11-CVE-2025-38208 and 4 more.