CVE-2024-8947: A vulnerability was found in MicroPython 1.22.2

This week

MEDIUM 5.6REMOTEDOWNGRADE

CVE-2024-8947 is a medium-severity flaw (CVSS 5.6) affecting micropython. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in MicroPython 1.22.2. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file py/objarray.c. The manipulation leads to use after free. The attack can be launched remotely. The complexity of an attack is rather high. The exploitation appears to be difficult. Upgrading to version 1.23.0 is able to address this issue. The identifier of the patch is 4bed614e707c0644c06e117f84

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.6 (Medium)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	1.0% (top 36%)
CISA exploited list	No
Weakness	CWE-416
Published	2024-09-17
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: micropython

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

Am I affected?

Timeline

2024-09-17 19:15 UTCPublished CVE record published
2026-06-17 08:23 UTCUpdated Record last modified

micropython micropython DOWNGRADE

Affected: 1.22.2

Fixed in: no fixed release known

Safe to downgrade to: a release before 1.22.2

1. Check installed version

apt-cache policy micropython || rpm -q micropython || micropython --version

2. No fixed release: DOWNGRADE to a release before 1.22.2 (Debian / Ubuntu)

apt-cache madison micropython sudo apt install micropython=<VERSION_BEFORE_1.22.2> sudo apt-mark hold micropython

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list micropython sudo dnf downgrade micropython-<VERSION_BEFORE_1.22.2> sudo dnf versionlock add micropython

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2024-8947?

micropython: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2024-8947 being exploited?

CVE-2024-8947 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-2024-8947 affect?

CVE-2024-8947 affects micropython. Severity is medium (CVSS 5.6). A vulnerability was found in MicroPython 1.22.2. It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file py/objarray.c. The manipulation leads to use after free. The attack can be launched re

How urgent is CVE-2024-8947?

Priority 46/100. Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-1998 LOW 3.3 UPGRADE A flaw has been found in micropython up to 1.27.0
CVE-2024-8948 HIGH 7.3 DOWNGRADE A vulnerability was found in MicroPython 1.23.0
CVE-2024-8946 HIGH 7.3 DOWNGRADE A vulnerability was found in MicroPython 1.23.0

References

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