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CVE-2026-119086

Missing type validation in xQueueSelectFromSet in FreeRTOS-Kernel

Missing queue-set type validation in the queue-set selection system call in FreeRTOS-Kernel before V11.3.3 on MPU-enabled ports with queue sets enabled allows a local unprivileged task to write actor-controlled data beyond a pointer-sized object on the privileged kernel stack, affecting privileged memory across the MPU isolation boundary. To remediate this issue, users should upgrade to FreeRTOS-Kernel V11.3.3, rebuild, and reflash affected firmware. Builds that do not enable queue sets are not affected.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Freertos
Products
Freertos-kernel
CVE-2026-109588

Numeric truncation in the MPU buffer authorization check in FreeRTOS-Kernel

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 write privileged kernel memory beyond the validated buffer window, via a stream buffer system call. To remediate this issue, users should upgrade to version V11.3.2 or later.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Freertos
Products
Freertos-kernel
CVE-2026-109587

Incorrect authorization in the Arm Cortex-R82 MPU port in FreeRTOS-Kernel

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.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Freertos
Products
Freertos-kernel
CVE-2026-77235

Missing privilege check in SecureContext_FreeContext in FreeRTOS-Kernel

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 issue, users should upgrade to version 11.3.1 or later.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Amazon Freertos
Products
Freertos Freertos-kernel
CVE-2026-77234

Improper input validation in FreeRTOS-Kernel timer command handling

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.

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Amazon Freertos
Products
Freertos Freertos-kernel
CVE-2026-77236

Missing size validation in SecureContext_AllocateContext in FreeRTOS-Kernel

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 should upgrade to version 11.3.1 or later.

CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Vendors
Amazon Freertos
Products
Freertos Freertos-kernel
CVE-2026-77237

Missing type validation in xQueueAddToSet in FreeRTOS-Kernel

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 version 11.3.1 or later.

CVSS 4.0 · 8.2 High EPSS < 1% KEV · Not listed
Vendors
Amazon Freertos
Products
Freertos Freertos-kernel