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CVE-2025-39920

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: pcmcia: Add error handling for add_interval() in do_validate_mem() In the do_validate_mem(), the call to add_interval() does no…

Published Oct 1, 2025CWE-476EPSS 0.16%

Overview

CVE-2025-39920 is a medium-severity vulnerability. It was published on October 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

pcmcia: Add error handling for add_interval() in do_validate_mem()

In the do_validate_mem(), the call to add_interval() does not

handle errors. If kmalloc() fails in add_interval(), it could

result in a null pointer being inserted into the linked list,

leading to illegal memory access when sub_interval() is called

next.

This patch adds an error handling for the add_interval(). If

add_interval() returns an error, the function will return early

with the error code.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/06b26e3099207c94b3d1be8565aedc6edc4f0a60Refgit.kernel.org/stable/c/289b58f8ff3198d091074a751d6b8f6827726f3eRefgit.kernel.org/stable/c/369bf6e241506583f4ee7593c53b92e5a9f271b4Refgit.kernel.org/stable/c/4a81f78caa53e0633cf311ca1526377d9bff7479Refgit.kernel.org/stable/c/5b60ed401b47897352c520bc724c85aa908dedccRefgit.kernel.org/stable/c/85be7ef8c8e792a414940a38d94565dd48d2f236Refgit.kernel.org/stable/c/8699358b6ac99b8ccc97ed9e6e3669ef8958ef7bRefgit.kernel.org/stable/c/ae184024ef31423e5beb44cf4f52999bbcf2fe5bReflists.debian.org/debian-lts-announce/2025/10/msg00007.htmlReflists.debian.org/debian-lts-announce/2025/10/msg00008.html

How CyberStrike helps

Frequently asked questions

What is CVE-2025-39920?

CVE-2025-39920 is a medium-severity vulnerability. It was published on October 1, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-39920?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2025-39920?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-39920?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-39920 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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