CVE-2025-48769

Apache NuttX RTOS: fs/vfs/fs_rename: use after free

CVSS 5.3 MEDIUMEPSS 1.5%CWE-416

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.3EPSS 1.5%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

01 Jan 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Apache Software Foundation · Apache NuttX RTOS

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References

https://github.com/apache/nuttx/pull/16455 https://lists.apache.org/thread/7m83v11ldfq7bvw72n9t5sccocczocjn http://www.openwall.com/lists/oss-security/2025/12/31/11