CVE-2026-44004
vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)
HIGH 7.5
At a glance
- Source
- NVD
- EPSS
- EPSS 0.42 % · percentile 36 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
Description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, sandboxed code can call Buffer.alloc() with an arbitrary size to allocate memory directly on the host heap. Because Buffer.alloc is a synchronous C++ native call, vm2's timeout option cannot interrupt it. A single request can exhaust host memory and crash the process with a FATAL ERROR: Reached heap limit. This vulnerability is fixed in 3.11.0.
Weaknesses (CWE)
- CWE-770 — Allocation of Resources Without Limits or Throttling
- CWE-1285 — Improper Validation of Specified Index, Position, or Offset in Input
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7
- https://access.redhat.com/security/cve/CVE-2026-44004
- https://bugzilla.redhat.com/show_bug.cgi?id=2477195
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004.json
- https://access.redhat.com/errata/RHSA-2026:50850
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 8.6 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-6785-pvv7-mvg7 — vm2 Sandbox Access to Host Buffer.alloc Allows timeout Bypass Resulting in Memory Exhaustion
European references
- ENISA EUVD · EUVD-2026-30074
- GCVE · GCVE-0-2026-44004
Affected configurations (NVD CPE)
cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:*< 3.11.0
Affected products
| Product | Versions |
|---|---|
| patriksimek · vm2 | affected < 3.11.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |