CVE-2024-11991

6.5 mediumEPSS 0.2%

Medium (6.5) in dfinity motoko. EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

6.5 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 15% of CVEs (scores of 2026-10-31)
CWE: CWE-908
Published: 2024-12-09
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

dfinity:motoko

References

https://github.com/dfinity/motoko/pull/4677
https://github.com/dfinity/motoko/security/advisories/GHSA-9rhg-3qf8-hrv3

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