CVE-2021-22680: NXP MQX Versions 5.1 and prior are vulnerable to integer overflow in mem_alloc, _lwmem_alloc and _partition fu

Q: How do I fix CVE-2021-22680?

mqx: upgrade to newer than 5.1. Exact commands for each OS are on this page.

Q: Is CVE-2021-22680 being exploited?

CVE-2021-22680 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2021-22680 affect?

CVE-2021-22680 affects mqx. Severity is high (CVSS 7.3). NXP MQX Versions 5.1 and prior are vulnerable to integer overflow in mem_alloc, _lwmem_alloc and _partition functions. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a cra

Q: How urgent is CVE-2021-22680?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

This month

HIGH 7.3REMOTEUPGRADE

CVE-2021-22680 is a high-severity flaw (CVSS 7.3) affecting mqx. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

NXP MQX Versions 5.1 and prior are vulnerable to integer overflow in mem_alloc, _lwmem_alloc and _partition functions. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Why this priority

High severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.3 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.6% (top 25%)
CISA exploited list	No
Weakness	CWE-190
Published	2022-05-03
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: nxp

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-05-03 21:15 UTCPublished CVE record published
2026-06-17 03:37 UTCUpdated Record last modified

nxp mqx UPGRADE

Affected: <= 5.1

Fixed in: newer than 5.1

Safe to downgrade to: no unaffected older release

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-22680?

mqx: upgrade to newer than 5.1. Exact commands for each OS are on this page.

Is CVE-2021-22680 being exploited?

CVE-2021-22680 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-22680 affect?

CVE-2021-22680 affects mqx. Severity is high (CVSS 7.3). NXP MQX Versions 5.1 and prior are vulnerable to integer overflow in mem_alloc, _lwmem_alloc and _partition functions. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a cra

How urgent is CVE-2021-22680?

Priority 49/100. High severity; Remotely exploitable, no login, no user action

References

← Back to latest CVEs