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    CVE-2025-48769

    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.

    Published:Jan 1, 2026
    Last Modified:Jan 6, 2026
    EPS:Jan 1, 2026
    EPSS Score:0.00027
    CVSS Score:5.3

    Affected Products

    Vendor
    Apache
    Product
    Nuttx

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-416 Use After Free

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2025-47868 (CVSS 9.8) — Out-of-bounds Write resulting in possible Heap-based Buffer Overflow vulnerability was discovered in tools/bdf…
    CVE-2025-35003 (CVSS 9.8) — Improper Restriction of Operations within the Bounds of a Memory Buffer and Stack-based Buffer Overflow vulner…
    CVE-2021-26461 (CVSS 9.8) — Apache Nuttx Versions prior to 10.1.0 are vulnerable to integer wrap-around in functions malloc, realloc and m…
    CVE-2020-17529 (CVSS 9.8) — Out-of-bounds Write vulnerability in TCP Stack of Apache NuttX (incubating) versions up to and including 9.1.0…
    CVE-2020-17528 (CVSS 9.1) — Out-of-bounds Write vulnerability in TCP stack of Apache NuttX (incubating) versions up to and including 9.1.0…
    CVE-2020-1939 (CVSS 9.8) — The Apache NuttX (Incubating) project provides an optional separate "apps" repository which contains various o…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High