---
id: CVE-2026-77235
title: >-
  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.…
summary: >-
  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.…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H'
cwe:
  - CWE-416
vendor: amazon
product: freertos
affected:
  - 'freertos >= 10.2.0, < 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-2026-77235'
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-55pf-q87x-c58c
    label: ff89ba41-3aa1-4d27-914a-91399e9639e5
tags:
  - nvd
epss: 0.00157
epssPercentile: 0.04379
ingestedAt: '2026-10-14T19:49:57.564Z'
---

## Overview

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.

## Affected

- `freertos >= 10.2.0, < 11.3.1`

## Remediation

Upgrade past the affected range:

- `freertos 11.3.1`