CVE-2021-26461: malloc, realloc and memalign implementations are vulnerable to integer wrap-arounds

Q: What is the severity of CVE-2021-26461?

CVE-2021-26461 is considered a critical vulnerability due to its potential for arbitrary memory allocation and remote code execution.

Q: How do I fix CVE-2021-26461?

To fix CVE-2021-26461, upgrade to Apache Nuttx version 10.1.0 or later.

Q: What are the consequences of exploiting CVE-2021-26461?

Exploitation of CVE-2021-26461 can lead to unexpected behavior such as system crashes or remote code execution.

Q: Which versions of software are affected by CVE-2021-26461?

CVE-2021-26461 affects Apache Nuttx versions prior to 10.1.0 and several other embedded operating systems and components.

Q: What systems are vulnerable to CVE-2021-26461?

Systems using affected versions of Apache Nuttx, Amazon FreeRTOS, and other related platforms are vulnerable to CVE-2021-26461.

Published Jun 21, 2021

Updated

Apache Nuttx Versions prior to 10.1.0 are vulnerable to integer wrap-around in functions malloc, realloc and memalign. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected Software

30 affected components

Multiple Amazon FreeRTOS, Version 10.4.1

Multiple Apache Nuttx OS, Version 9.1.0

Multiple ARM CMSIS-RTOS2, versions prior to 2.1.3

Multiple ARM Mbed OS, Version 6.3.0

Multiple ARM mbed-ualloc, Version 1.3.0

Multiple BlackBerry QNX SDP Versions 6.5.0 SP1 and earlier

Multiple BlackBerry QNX OS for Safety Versions 1.0.1 and earlier safety products compliant with IEC 61508 and/or ISO 26262

Multiple BlackBerry QNX OS for Medical Versions 1.1 and earlier safety products compliant with IEC 62304 A full list of affected QNX products and versions is available here

Multiple A full list of affected QNX products and versions is available here

Multiple Cesanta Software Mongoose OS, v2.17.0

Multiple eCosCentric eCosPro RTOS, Versions 2.0.1 through 4.5.3

Multiple Google Cloud IoT Device SDK, Version 1.0.2

Multiple Media Tek LinkIt SDK, versions prior to 4.6.1

Multiple Micrium OS, Versions 5.10.1 and prior

Multiple Micrium uC/OS: uC/LIB Versions 1.38.xx, Version 1.39.00

Multiple NXP MCUXpresso SDK, versions prior to 2.8.2

Multiple NXP MQX, Versions 5.1 and prior

Multiple Redhat newlib, versions prior to 4.0.0

Multiple RIOT OS, Version 2020.01.1

Multiple Samsung Tizen RT RTOS, versions prior 3.0.GBB

Multiple TencentOS-tiny, Version 3.1.0

Multiple Texas Instruments CC32XX, versions prior to 4.40.00.07

Multiple Texas Instruments SimpleLink MSP432E4XX

Multiple Texas Instruments SimpleLink-CC13XX, versions prior to 4.40.00

Multiple Texas Instruments SimpleLink-CC26XX, versions prior to 4.40.00

Multiple Texas Instruments SimpleLink-CC32XX, versions prior to 4.10.03

Multiple Uclibc-NG, versions prior to 1.0.36

Multiple Windriver VxWorks, prior to 7.0

Multiple Zephyr Project RTOS, versions prior to 2.5

Apache Nuttx<10.1.0

Event History

Jun 21, 2021

CVE Published

via MITRE·05:10 PM

Data Sourced

via MITRE·05:10 PM

DescriptionWeakness

Parent advisories

This vulnerability appears in the following advisories.

ICSA-21-119-04

Frequently Asked Questions

What is the severity of CVE-2021-26461?

CVE-2021-26461 is considered a critical vulnerability due to its potential for arbitrary memory allocation and remote code execution.

How do I fix CVE-2021-26461?

To fix CVE-2021-26461, upgrade to Apache Nuttx version 10.1.0 or later.

What are the consequences of exploiting CVE-2021-26461?

Exploitation of CVE-2021-26461 can lead to unexpected behavior such as system crashes or remote code execution.

Which versions of software are affected by CVE-2021-26461?