FreeRTOS vulnerabilities

6 known vulnerabilities in FreeRTOS from Amazon. 6 are rated high or critical. Each entry lists the affected versions and the release that fixes it, where the vendor has published one.

Latest first

• 8.4 High severity

  FreeRTOS-Kernel: Out-of-bounds Read

  CVE-2026-77237Aug 21, 2026FreeRTOS

  Missing queue-set type validation in xQueueAddToSet() in the FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports with configUSE_QUEUE_SETS=1 to read privileged kernel memory. To remediate this issue, users should upgrade to vers

• 7.3 High severity

  FreeRTOS-Kernel: Out-of-bounds Write

  CVE-2026-77236Aug 21, 2026FreeRTOS

  Missing minimum size validation in secure context allocation in FreeRTOS-Kernel before 11.3.1 might allow local users to corrupt secure-world heap metadata via an out-of-bounds write with an undersized stack size parameter. To remediate this issue, users shoul

• 7.3 High severity

  FreeRTOS-Kernel: Use After Free

  CVE-2026-77235Aug 21, 2026FreeRTOS

  Missing privilege verification in the secure context cleanup handler in FreeRTOS-Kernel before 11.3.1 might allow local users to cause a use-after-free condition in secure-world memory via the SVC handler for secure context deallocation. To remediate this issu

• 8.8 High severity

  FreeRTOS-Kernel: Incorrect Authorization

  CVE-2026-77234Aug 21, 2026FreeRTOS

  Improper input validation in FreeRTOS-Kernel before 11.3.1 might allow an unprivileged task on MPU-enabled ports to execute code in privileged kernel context. To remediate this issue, users should upgrade to version 11.3.1 or later.

• 7.5 High severity

  FreeRTOS: Out-of-bounds Write

  CVE-2025-5688Jun 4, 2025Amazon

  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 lat

• 7.8 High severity

  FreeRTOS-Kernel: Improper Access Control

  CVE-2024-28115Mar 7, 2024FreeRTOS

  FreeRTOS is a real-time operating system for microcontrollers. FreeRTOS Kernel versions through 10.6.1 do not sufficiently protect against local privilege escalation via Return Oriented Programming techniques should a vulnerability exist that allows code injec