---
id: "CVE-2026-113421"
kind: "vulnerability"
aliases: ["CVE-2026-113421"]
title: "Eclipse ThreadX: unloaded module callback can run with kernel privileges"
severity: "high"
cvss: 7.3
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["embedded", "rtos", "runtime", "threadx"]
not_affected_if: ["modules-unused", "tracing-disabled"]
published_at: "2026-11-03T09:17:10+00:00"
first_seen_at: "2026-11-03T09:19:50+00:00"
updated_at: "2026-11-03T09:20:17+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-113421", "first_seen_at": "2026-11-03T09:19:50+00:00"}]
---

# Eclipse ThreadX: unloaded module callback can run with kernel privileges

ThreadX Modules does not clear a module's trace-buffer-full callback when the module is stopped and unloaded. A later trace buffer wrap can then call code that has already been released, running it with kernel privileges or redirecting control flow.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the ThreadX version in use: affected versions are 6.0.1 through 6.5.2.202603.
- Check whether ThreadX Modules and event tracing are enabled in the build configuration: unknown if the sources do not say which setting.

## Fix

- Move to a ThreadX release newer than `6.5.2.202603`: the sources do not name the fixed version.

## Timeline

- 2026-11-03T09:19:50+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-113421

## Documents

- [advisory] Vendor advisory: github.com https://github.com/eclipse-threadx/threadx/security/advisories/GHSA-8pgj-qvjv-j4fq

## From the sources

In Eclipse ThreadX versions 6.0.1 through 6.5.2.202603, ThreadX Modules does not revoke a module's trace-buffer-full callback when the module is stopped and unloaded. With event tracing enabled and a kernel-owned trace buffer still active, a later buffer wrap invokes the callback from privileged thread context after the module's code has been released, so a user-mode module can have its code run with kernel privileges after unload, or, once the memory is reused, redirect control flow or cause a fault.

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