CVE-2024-11991

Name: CVE-2024-11991
Creator: NVD / NIST
Published: 2024-12-09T15:15:12.203+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.23%

Last modified Jun 17, 2026

CVE-2024-11991 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. Motoko's incremental garbage collector is impacted by an uninitialized memory access bug, caused by incorrect use of write barriers in a few locations. This vulnerability could potentially allow unauthorized read or write access to a Canister's memory. EPSS estimates a 0.23% chance of exploitation in the next 30 days.

Description

Motoko's incremental garbage collector is impacted by an uninitialized memory access bug, caused by incorrect use of write barriers in a few locations. This vulnerability could potentially allow unauthorized read or write access to a Canister's memory. However, exploiting this bug requires the Canister to enable the incremental garbage collector or enhanced orthogonal persistence, which are non-default features in Motoko.

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

EPSS Probability

0.23%

14.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-908

Affected Software

Vendor	Product	Versions
Dfinity	Motoko	>= 0.9.0, < 0.13.4

References

https://github.com/dfinity/motoko/pull/4677Issue Tracking, Patch
https://github.com/dfinity/motoko/security/advisories/GHSA-9rhg-3qf8-hrv3Vendor Advisory

Timeline

Published: Dec 9, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2024-11991?

How severe is CVE-2024-11991?

CVE-2024-11991 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.23% probability of exploitation in the next 30 days.

How do I fix CVE-2024-11991?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2024-11991?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST