CVE-2025-55131 — nodejs / node

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
nodejs / node	affected 20.19.6 through 20.19.6; affected 22.21.1 through 22.21.1; affected 24.12.0 through 24.12.0; affected 25.2.1 through 25.2.1; affected 4.0 before 4.; affected 5.0 before 5.; affected 6.0 before 6.; affected 7.0 before 7.; affected 8.0 before 8.; affected 9.0 before 9.; affected 10.0 before 10.; affected 11.0 before 11.; affected 12.0 before 12.; affected 13.0 before 13.; affected 14.0 before 14.; affected 15.0 before 15.; affected 16.0 before 16.; affected 17.0 before 17.; affected 18.0 before 18.*

Vendor / product

Versions

nodejs / node

affected 20.19.6 through 20.19.6; affected 22.21.1 through 22.21.1; affected 24.12.0 through 24.12.0; affected 25.2.1 through 25.2.1; affected 4.0 before 4.*; affected 5.0 before 5.*; affected 6.0 before 6.*; affected 7.0 before 7.*; affected 8.0 before 8.*; affected 9.0 before 9.*; affected 10.0 before 10.*; affected 11.0 before 11.*; affected 12.0 before 12.*; affected 13.0 before 13.*; affected 14.0 before 14.*; affected 15.0 before 15.*; affected 16.0 before 16.*; affected 17.0 before 17.*; affected 18.0 before 18.*

CWE

No CWE identifiers supplied.

References

https://nodejs.org/en/blog/vulnerability/december-2025-security-releases

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.

redhat-SADP

A memory exposure flaw has been discovered in Node.js. 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.