FreeRTOS vulnerabilities
We track 10 vulnerabilities in FreeRTOS products across 3 products. 10 are rated high or critical, and none are known to be exploited. The most recent was published on October 16, 2026.
Latest FreeRTOS vulnerabilities
- 8.8 High severity
FreeRTOS-Kernel: Out-of-bounds Read
Numeric truncation of the buffer length in the MPU buffer authorization check in FreeRTOS-Kernel V11.3.0 and V11.3.1 on the Arm Cortex-R82 (Armv8-R AArch64) MPU port might allow, under certain conditions, an unprivileged task on MPU-enabled builds to read or w
- 8.8 High severity
FreeRTOS-Kernel: Incorrect Authorization
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 a
- 7.7 High severity
FreeRTOS-Plus-TCP: Improper Verification of Source of a Communication Channel
Improper verification of the source of a communication channel in the IPv6 Router Advertisement handler in Amazon FreeRTOS-Plus-TCP before V4.4.2 might allow a remote third-party to influence an endpoint's IPv6 default gateway, on-link prefix, and address conf
- 8.4 High severity
FreeRTOS-Kernel: Out-of-bounds Read
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
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
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
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.
- 9.1 Critical severity
coreMQTT: Out-of-bounds Read
Missing bounds validation in the MQTT v5.0 property parser in coreMQTT before 5.0.1 allows an MQTT broker to cause a denial of service by sending a crafted packet. To remediate this issue, users should upgrade to v5.0.1.
- 8.1 High severity
FreeRTOS-Plus-TCP: Out-of-bounds Read
FreeRTOS-Plus-TCP is a lightweight TCP/IP stack for FreeRTOS. FreeRTOS-Plus-TCP versions 4.0.0 through 4.1.0 contain a buffer over-read issue in the DNS Response Parser when parsing domain names in a DNS response. A carefully crafted DNS response with domain n
- 7.8 High severity
FreeRTOS-Kernel: Improper Access Control
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