CVE-2025-48769

Name: CVE-2025-48769
Creator: NVD / NIST
Published: 2026-01-01T17:15:43.243+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.1/10EPSS 1.51%

Last modified Jun 17, 2026

CVE-2025-48769 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 1.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.1/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS Probability

1.51%

71.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Apache	Nuttx	>= 7.20, < 12.11.0

References

https://github.com/apache/nuttx/pull/16455Issue Tracking
https://lists.apache.org/thread/7m83v11ldfq7bvw72n9t5sccocczocjnMailing List, Vendor Advisory
http://www.openwall.com/lists/oss-security/2025/12/31/11Mailing List, Third Party Advisory

Timeline

Published: Jan 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-48769?

How severe is CVE-2025-48769?

CVE-2025-48769 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 1.51% probability of exploitation in the next 30 days.

How do I fix CVE-2025-48769?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-48769?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST