CVE Feed

    Dashboard / CVE / CVE-2025-5688

    CVE-2025-5688

    We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries with very long DNS names. This issue only affects systems using Buffer Allocation Scheme 1 with LLMNR or mDNS enabled. Users should upgrade to the latest version and ensure any forked or derivative code is patched to incorporate the new fixes.

    Published:Jun 4, 2025
    Last Modified:Apr 15, 2026
    EPS:Jun 4, 2025
    EPSS Score:0.00109
    CVSS Score:7.5

    Affected Products

    Vendor
    Amazon
    Product
    Freertos

    Exploits

    https://github.com/mbanyamer/CVE-2025-5688-FreeRTOS-Plus-TCP-Out-of-Bounds-Write

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-77237 (CVSS 8.2) — Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unpr…
    CVE-2026-77236 (CVSS 8.3) — Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow loca…
    CVE-2026-77235 (CVSS 8.3) — Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might al…
    CVE-2026-77234 (CVSS 9.3) — Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled por…
    CVE-2024-28115 (CVSS 8.8) — FreeRTOS is a real-time operating system for microcontrollers. FreeRTOS Kernel versions through 10.6.1 do not …
    CVE-2021-27504 (CVSS 7.4) — Texas Instruments devices running FREERTOS, malloc returns a valid pointer to a small buffer on extremely lar…
    CVE-2021-43997 (CVSS 7.8) — FreeRTOS versions 10.2.0 through 10.4.5 do not prevent non-kernel code from calling the xPortRaisePrivilege in…
    CVE-2021-32020 (CVSS 9.8) — The kernel in Amazon Web Services FreeRTOS before 10.4.3 has insufficient bounds checking during management of…
    CVE-2021-31572 (CVSS 9.8) — The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in stream_buffer.c for a stre…
    CVE-2021-31571 (CVSS 9.8) — The kernel in Amazon Web Services FreeRTOS before 10.4.3 has an integer overflow in queue.c for queue creation…

    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