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CVE-2025-39920
pcmcia: Add error handling for add_interval() in do_validate_mem()
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.

INFO

Published Date :

Oct. 1, 2025, 8:15 a.m.

Last Modified :

Oct. 2, 2025, 7:12 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-39920 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Handle errors from add_interval() to prevent null pointer insertion and memory access issues.
  • Apply the provided kernel patch.
  • Update to a fixed Linux kernel version.
  • Ensure error handling for add_interval() is implemented.
Public PoC/Exploit Available at Github

CVE-2025-39920 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-39920.

URL Resource
https://git.kernel.org/stable/c/06b26e3099207c94b3d1be8565aedc6edc4f0a60
https://git.kernel.org/stable/c/289b58f8ff3198d091074a751d6b8f6827726f3e
https://git.kernel.org/stable/c/369bf6e241506583f4ee7593c53b92e5a9f271b4
https://git.kernel.org/stable/c/4a81f78caa53e0633cf311ca1526377d9bff7479
https://git.kernel.org/stable/c/5b60ed401b47897352c520bc724c85aa908dedcc
https://git.kernel.org/stable/c/85be7ef8c8e792a414940a38d94565dd48d2f236
https://git.kernel.org/stable/c/8699358b6ac99b8ccc97ed9e6e3669ef8958ef7b
https://git.kernel.org/stable/c/ae184024ef31423e5beb44cf4f52999bbcf2fe5b
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-39920 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-39920 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Profile Photo
w4zu/Debian_security

DSA and DLA for Debian last 14 days

Python

Updated: 2 days, 10 hours ago
0 stars 0 fork 0 watcher
Born at : Feb. 12, 2025, 2:08 p.m. This repo has been linked 562 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-39920 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-39920 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Oct. 01, 2025

    Action Type Old Value New Value
    Added 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.
    Added Reference https://git.kernel.org/stable/c/06b26e3099207c94b3d1be8565aedc6edc4f0a60
    Added Reference https://git.kernel.org/stable/c/289b58f8ff3198d091074a751d6b8f6827726f3e
    Added Reference https://git.kernel.org/stable/c/369bf6e241506583f4ee7593c53b92e5a9f271b4
    Added Reference https://git.kernel.org/stable/c/4a81f78caa53e0633cf311ca1526377d9bff7479
    Added Reference https://git.kernel.org/stable/c/5b60ed401b47897352c520bc724c85aa908dedcc
    Added Reference https://git.kernel.org/stable/c/85be7ef8c8e792a414940a38d94565dd48d2f236
    Added Reference https://git.kernel.org/stable/c/8699358b6ac99b8ccc97ed9e6e3669ef8958ef7b
    Added Reference https://git.kernel.org/stable/c/ae184024ef31423e5beb44cf4f52999bbcf2fe5b
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.