CVE-2025-48769
Apache NuttX RTOS: fs/vfs/fs_rename: use after free
Description
Use After Free vulnerability was discovered in fs/vfs/fs_rename code of the Apache NuttX RTOS, that due recursive implementation and single buffer use by two different pointer variables allowed arbitrary user provided size buffer reallocation and write to the previously freed heap chunk, that in specific cases could cause unintended virtual filesystem rename/move operation results. This issue affects Apache NuttX RTOS: from 7.20 before 12.11.0. Users of virtual filesystem based services with write access especially when exposed over the network (i.e. FTP) are affected and recommended to upgrade to version 12.11.0 that fixes the issue.
INFO
Published Date :
Jan. 1, 2026, 5:15 p.m.
Last Modified :
Jan. 6, 2026, 2:35 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Solution
- Upgrade Apache NuttX RTOS to version 12.11.0.
- Apply the provided patch for the vfs_rename code.
- Review and validate filesystem rename operations.
- Ensure network-exposed services are secured.
Public PoC/Exploit Available at Github
CVE-2025-48769 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-2025-48769.
| URL | Resource |
|---|---|
| https://github.com/apache/nuttx/pull/16455 | Issue Tracking |
| https://lists.apache.org/thread/7m83v11ldfq7bvw72n9t5sccocczocjn | Mailing List Vendor Advisory |
| http://www.openwall.com/lists/oss-security/2025/12/31/11 | Mailing List Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-48769 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-2025-48769
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).
None
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-48769 vulnerability anywhere in the article.
-
CybersecurityNews
Apache NuttX Vulnerability Let Attackers to Crash Systems
A newly disclosed use-after-free vulnerability in Apache NuttX RTOS could allow attackers to cause system crashes and unintended filesystem operations, prompting urgent security warnings for users run ... Read more
The following table lists the changes that have been made to the
CVE-2025-48769 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.
-
Initial Analysis by [email protected]
Jan. 06, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:apache:nuttx:*:*:*:*:*:*:*:* versions from (including) 7.20 up to (excluding) 12.11.0 Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2025/12/31/11 Types: Mailing List, Third Party Advisory Added Reference Type Apache Software Foundation: https://github.com/apache/nuttx/pull/16455 Types: Issue Tracking Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/7m83v11ldfq7bvw72n9t5sccocczocjn Types: Mailing List, Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jan. 05, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N -
New CVE Received by [email protected]
Jan. 01, 2026
Action Type Old Value New Value Added Description Use After Free vulnerability was discovered in fs/vfs/fs_rename code of the Apache NuttX RTOS, that due recursive implementation and single buffer use by two different pointer variables allowed arbitrary user provided size buffer reallocation and write to the previously freed heap chunk, that in specific cases could cause unintended virtual filesystem rename/move operation results. This issue affects Apache NuttX RTOS: from 7.20 before 12.11.0. Users of virtual filesystem based services with write access especially when exposed over the network (i.e. FTP) are affected and recommended to upgrade to version 12.11.0 that fixes the issue. Added CWE CWE-416 Added Reference https://github.com/apache/nuttx/pull/16455 Added Reference https://lists.apache.org/thread/7m83v11ldfq7bvw72n9t5sccocczocjn -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Jan. 01, 2026
Action Type Old Value New Value Added Reference http://www.openwall.com/lists/oss-security/2025/12/31/11