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.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2025-55131US | — | — | ||
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 tim… | ||||
references
External citations — patches, advisories, analysis.
- https://access.redhat.com/errata/RHSA-2026:1842WEB
- https://access.redhat.com/errata/RHSA-2026:1843WEB
- https://access.redhat.com/errata/RHSA-2026:2420WEB
- https://access.redhat.com/errata/RHSA-2026:2421WEB
- https://access.redhat.com/errata/RHSA-2026:2422WEB
- https://access.redhat.com/errata/RHSA-2026:2767WEB
- https://access.redhat.com/errata/RHSA-2026:2768WEB
- https://access.redhat.com/errata/RHSA-2026:2781WEB
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