Uninitialized memory access in Motoko incremental garbage collector
Priority LOW 28CWE-908Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00244 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Internet Computer | Motoko | 0.9.0 – 0.13.3 | — | No fix listed | CNA |
- Motoko VendorInternet Computer Affected 0.9.0 – 0.13.3 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:dfinity:motoko:*:*:*:*:*:*:*:* | 0.9.0 to before 0.13.4 | Vulnerable | Internet Computer |
- cpe:2.3:a:dfinity:motoko:*:*:*:*:*:*:*:* Versions 0.9.0 to before 0.13.4 Vulnerable ·Internet Computer
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2024-11991
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences