A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact.
Metrics
Affected Vendors & Products
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References
History
Tue, 20 Jan 2026 20:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module with the timeout option. Under specific timing conditions, buffers allocated with `Buffer.alloc` and other `TypedArray` instances like `Uint8Array` may contain leftover data from previous operations, allowing in-process secrets like tokens or passwords to leak or causing data corruption. While exploitation typically requires precise timing or in-process code execution, it can become remotely exploitable when untrusted input influences workload and timeouts, leading to potential confidentiality and integrity impact. | |
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cvssV3_0
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MITRE
Status: PUBLISHED
Assigner: hackerone
Published:
Updated: 2026-01-20T20:41:55.591Z
Reserved: 2025-08-07T15:00:05.576Z
Link: CVE-2025-55131
Vulnrichment
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NVD
Status : Received
Published: 2026-01-20T21:16:03.320
Modified: 2026-01-20T21:16:03.320
Link: CVE-2025-55131
Redhat
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OpenCVE Enrichment
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