CVE-2026-44004
vm2: Host Process OOM DoS via Buffer.alloc (Timeout Bypass)
- State
- Published
- Severity
- 7.5 High
- Published
- May 13, 2026
- Updated
- Sep 7, 2026
- Reserved
- May 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.5 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| 3.1 | 8.6 High | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H | redhat-SADP |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
vm2patriksimek |
|
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-6785-pvv7-mvg7
- https://access.redhat.com/security/cve/CVE-2026-44004vdb-entry
- RHBZ#2477195issue-tracking
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-44004.json
- https://access.redhat.com/errata/RHSA-2026:50850vendor-advisory
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