---
id: CVE-2026-77234
title: >-
  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
summary: "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."
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-863
vendor: amazon
product: freertos
affected:
  - 'freertos >= 7.0.0, < 11.3.1'
patched:
  - freertos 11.3.1
published: '2026-08-21'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T19:10:00.297'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-77234'
references:
  - url: 'https://aws.amazon.com/security/security-bulletins/2026-086-aws/'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: 'https://github.com/FreeRTOS/FreeRTOS-Kernel/releases/tag/V11.3.1'
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
  - url: >-
      https://github.com/FreeRTOS/FreeRTOS-Kernel/security/advisories/GHSA-w3vr-pr75-5hc6
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
tags:
  - nvd
epss: 0.0017
epssPercentile: 0.0593
ingestedAt: '2026-10-14T19:49:57.564Z'
---

## Overview

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.

## Affected

- `freertos >= 7.0.0, < 11.3.1`

## Remediation

Upgrade past the affected range:

- `freertos 11.3.1`