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    CVE-2026-109587

    Incorrect authorization in the Arm Cortex-R82 (Armv8-R AArch64) MPU port in FreeRTOS-Kernel V11.3.0 and V11.3.1 might allow an unprivileged task on MPU-enabled builds to read and write privileged kernel memory outside the regions assigned to it, via a buffer argument passed to an MPU system call. To remediate this issue, users should upgrade to version V11.3.2 or later.

    Published:Oct 16, 2026
    Last Modified:Oct 20, 2026
    EPS:Oct 16, 2026
    EPSS Score:0.00138
    CVSS Score:8.8

    Affected Products

    Vendor
    Freertos
    Product
    Freertos-kernel

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-863 Incorrect Authorization

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-119086 (CVSS 8.2) — Missing queue-set type validation in the queue-set selection system call in FreeRTOS-Kernel before V11.3.3 on …
    CVE-2026-109588 (CVSS 9.3) — Numeric truncation of the buffer length in the MPU buffer authorization check in FreeRTOS-Kernel V11.3.0 and V…
    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…

    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