What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-05-09 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Debian Linux: 11.0
• Linux kernel: from 5.6.7 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.135; from 6.2 before 6.6.88; from 6.7 before 6.12.24; from 6.13 before 6.13.12 — fixed in 5.10.237, 5.15.181, 6.1.135, 6.12.24, 6.13.12, 6.14.3

How to fix

Upgrade to a fixed version: Linux kernel 5.10.237, 5.15.181, 6.1.135, 6.12.24. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/20048e658652e731f5cadf4a695925e570ca0ff9
• https://git.kernel.org/stable/c/6c14ee6af8f1f188b668afd6d003f7516a507b08
• https://git.kernel.org/stable/c/864ba5c651b03830f36f0906c21af05b15c1aaa6
• https://git.kernel.org/stable/c/9c9000cb91b986eb7f75835340c67857ab97c09b
• https://git.kernel.org/stable/c/b2a1833e1c63e2585867ebeaf4dd41494dcede4b
• https://git.kernel.org/stable/c/b4885bd5935bb26f0a414ad55679a372e53f9b9b
• https://git.kernel.org/stable/c/ba3ce6c60cd5db258687dfeba9fc608f5e7cadf3
• https://git.kernel.org/stable/c/e0717385f5c51e290c2cd2ad4699a778316b5132
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html

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