CVE-2025-48769

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

HIGH
8.1
CVSS Score
Published: January 1, 2026 at 04:14 PM UTC
Updated: October 7, 2026 at 11:10 AM UTC
1 product affected across 1 vendorNuttx

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Severity
HIGH8.1
Exploit prediction
EPSS 2%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

7.20 ≤ v < 12.11.07.20
Affected range stops below 12.11.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

PatchIssue Tracking
Source: cverecord
https://github.com/apache/nuttx/pull/16455
Vendor AdvisoryMailing List
Source: cverecord
https://lists.apache.org/thread/7m83v11ldfq7bvw72n9t5sccocczocjn
Mailing ListThird Party Advisory
Source: af854a3a-2127-422b-91ae-364da2661108
http://www.openwall.com/lists/oss-security/2025/12/31/11

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-416

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