CVE-2025-37844 cifs: avoid NULL pointer dereference in dbg call

What is CVE-2025-37844?

CVE-2025-37844 is a medium-severity vulnerability in Debian Debian Linux, published on 9 May 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:

cifs: avoid NULL pointer dereference in dbg call

cifs_server_dbg() implies server to be non-NULL so move call under condition to avoid NULL pointer dereference.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Weakness: CWE-476

Which versions are affected by CVE-2025-37844?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2025-37844?

Apply the vendor's patch.

Is CVE-2025-37844 being exploited?

There is no known exploitation of CVE-2025-37844 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

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

Also known as BELL-CVE-2025-37844, DEBIAN-CVE-2025-37844, GHSA-ch6f-q6p6-gf44, ROOT-OS-DEBIAN-12-CVE-2025-37844, ROOT-OS-UBUNTU-2204-CVE-2025-37844, ROOT-OS-UBUNTU-2404-CVE-2025-37844 and 1 more.