CVE-2025-55131: 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…

high7.1CVSS 3.0

AVNACHPRLUINSUCHIHAL

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

22 ranges

Vendor	Product	Version range	Fixed in
debian	nodejs	< nodejs 22.22.0+dfsg+~cs22.19.6-1 (forky)	nodejs 22.22.0+dfsg+~cs22.19.6-1 (forky)
nodejs	node	>= 10.0 < 10.*	10.*
nodejs	node	>= 11.0 < 11.*	11.*
nodejs	node	>= 12.0 < 12.*	12.*
nodejs	node	>= 13.0 < 13.*	13.*
nodejs	node	>= 14.0 < 14.*	14.*
nodejs	node	>= 15.0 < 15.*	15.*
nodejs	node	>= 16.0 < 16.*	16.*
nodejs	node	>= 17.0 < 17.*	17.*
nodejs	node	>= 18.0 < 18.*	18.*
nodejs	node	20.19.6 – 20.19.6	—
nodejs	node	22.21.1 – 22.21.1	—
nodejs	node	24.12.0 – 24.12.0	—
nodejs	node	25.2.1 – 25.2.1	—
nodejs	node	>= 4.0 < 4.*	4.*
nodejs	node	>= 5.0 < 5.*	5.*
nodejs	node	>= 6.0 < 6.*	6.*
nodejs	node	>= 7.0 < 7.*	7.*
nodejs	node	>= 8.0 < 8.*	8.*
nodejs	node	>= 9.0 < 9.*	9.*
nodejs	nodejs	>= 0 < 20.19.2+dfsg-1+deb13u1	20.19.2+dfsg-1+deb13u1
nodejs	nodejs	>= 0 < 22.22.0+dfsg+~cs22.19.6-1	22.22.0+dfsg+~cs22.19.6-1

CVSS provenance

nvdv3.07.1HIGHCVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

osv7.1HIGH