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CVE-2024-11991

19
FAUCET Score

CVE-2024-11991 is a medium-severity vulnerability affecting DFINITY Motoko, specifically its incremental garbage collector. The flaw stems from incorrect write barrier usage, leading to an uninitialized memory access bug that could allow unauthorized read or write access to a Canister's memory. Exploitation requires the Canister to utilize non-default features like the incremental garbage collector or enhanced orthogonal persistence. Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.9.0, < 0.13.4CPE matchmatch criteria
cpe:2.3:a:dfinity:motoko:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.6MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
2.2
Impact Score
3.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.24%
Probability of exploitation in next 30 days
EPSS Percentile
14.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0024 is in the 6th percentile among its peer group of 23,684 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

github.com / dfinity/motoko/pull/4677
Issue TrackingPatch
github.com / dfinity/motoko/security/advisories/GHSA-9rhg-3qf8-hrv3
Vendor Advisory