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    Dashboard / CVE / CVE-2021-27504

    CVE-2021-27504

    Texas Instruments devices running FREERTOS, malloc returns a valid pointer to a small buffer on extremely large values, which can trigger an integer overflow vulnerability in 'malloc' for FreeRTOS, resulting in code execution.

    Published:Nov 21, 2023
    Last Modified:Nov 21, 2024
    EPS:Nov 21, 2023
    EPSS Score:0.00124
    CVSS Score:7.4

    Affected Products

    Vendor
    Amazon
    Product
    Freertos
    Vendor
    Ti
    Product
    Simplelink Cc13xx Software Development Kit
    Vendor
    Ti
    Product
    Simplelink Cc26xx Software Development Kit
    Vendor
    Ti
    Product
    Simplelink Cc32xx Software Development Kit
    Vendor
    Ti
    Product
    Simplelink Msp432e401y
    Vendor
    Ti
    Product
    Simplelink Msp432e411y

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-190 Integer Overflow or Wraparound

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-92 Forced Integer Overflow

    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-2025-5688 (CVSS 7.5) — We have identified a buffer overflow issue allowing out-of-bounds write when processing LLMNR or mDNS queries …
    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-2021-43997 (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