7.1
HIGH
CVSS 3.1
CVE-2025-55131
"Node.js Buffer Allocation Logic Uninitialized Memory Disclosure Vulnerability"
Overview
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.
Details
INFO
Published Date :
Jan. 20, 2026, 9:16 p.m.
Last Modified :
July 15, 2026, 2:17 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework
for assessing the severity of vulnerabilities in software and systems.
We collect and displays CVSS scores from various sources for each CVE.
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.0 | HIGH | [email protected] | ||||
| CVSS 3.1 | HIGH | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c |
Solution
Update Node.js to a version that addresses buffer allocation issues when using the vm module with timeouts.
- Update Node.js to a patched version.
- Review buffer allocation and vm module usage.
- Avoid untrusted input influencing timeouts.
- Implement strict input validation.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2025-55131.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2025-55131 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2025-55131
weaknesses.
CAPEC-8: Buffer Overflow in an API Call Buffer Overflow in an API Call
CAPEC-9: Buffer Overflow in Local Command-Line Utilities Buffer Overflow in Local Command-Line Utilities
CAPEC-10: Buffer Overflow via Environment Variables Buffer Overflow via Environment Variables
CAPEC-14: Client-side Injection-induced Buffer Overflow Client-side Injection-induced Buffer Overflow
CAPEC-24: Filter Failure through Buffer Overflow Filter Failure through Buffer Overflow
CAPEC-42: MIME Conversion MIME Conversion
CAPEC-44: Overflow Binary Resource File Overflow Binary Resource File
CAPEC-45: Buffer Overflow via Symbolic Links Buffer Overflow via Symbolic Links
CAPEC-46: Overflow Variables and Tags Overflow Variables and Tags
CAPEC-47: Buffer Overflow via Parameter Expansion Buffer Overflow via Parameter Expansion
CAPEC-67: String Format Overflow in syslog() String Format Overflow in syslog()
CAPEC-92: Forced Integer Overflow Forced Integer Overflow
CAPEC-100: Overflow Buffers Overflow Buffers
CAPEC-170: Web Application Fingerprinting Web Application Fingerprinting
CAPEC-694: System Location Discovery System Location Discovery
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2025-55131 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2025-55131 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jul. 15, 2026
Action Type Old Value New Value Changed Affected [{'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v. 10.0)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.1'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 10)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 8)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.4::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v.9.4)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v.9.6)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 9)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'defaultStatus': 'affected'}] [{'cpes': ['cpe:/o:redhat:enterprise_linux:10.1'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10', 'versions': [{'status': 'unaffected', 'version': '1:24.13.0-1.el10_1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs24', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.1'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10', 'versions': [{'status': 'unaffected', 'version': '1:22.22.0-3.el10_1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs22', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 10.0 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '1:22.22.0-1.el10_0', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs22', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'versions': [{'status': 'unaffected', 'version': '8100020260116121421.6d880403', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:24', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'versions': [{'status': 'unaffected', 'version': '8100020260119091831.6d880403', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:22', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 8', 'versions': [{'status': 'unaffected', 'version': '8100020260119100525.489197e6', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:20', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'versions': [{'status': 'unaffected', 'version': '9070020260117213814.rhel9', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:24', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'versions': [{'status': 'unaffected', 'version': '9070020260117213838.rhel9', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:22', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9', 'versions': [{'status': 'unaffected', 'version': '9070020260117213748.rhel9', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:20', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.4'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9.4 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '9040020260211171433.rhel9', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:20', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9.6 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '9060020260210180816.rhel9', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:20', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux 9.6 Extended Update Support', 'versions': [{'status': 'unaffected', 'version': '9060020260210120402.rhel9', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs:22', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '24.14.1-4.1.hum1', 'lessThan': '*', 'versionType': 'rpm'}, {'status': 'unaffected', 'version': '24.14.1-4.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs24-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '25.9.0-1.1.hum1', 'lessThan': '*', 'versionType': 'rpm'}, {'status': 'unaffected', 'version': '25.9.0-1.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs25-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '20.20.0-7.1.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs20-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'versions': [{'status': 'unaffected', 'version': '22.22.0-1.3.hum1', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'nodejs22-main', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}] -
CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:/o:redhat:enterprise_linux_eus:10.0'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v. 10.0)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/o:redhat:enterprise_linux:10.1'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 10)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:8::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 8)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.4::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v.9.4)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:rhel_eus:9.6::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream EUS (v.9.6)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:enterprise_linux:9::appstream'], 'vendor': 'Red Hat', 'product': 'Red Hat Enterprise Linux AppStream (v. 9)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:hummingbird:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Hardened Images', 'defaultStatus': 'affected'}] Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L Added CWE CWE-497 Added Reference https://access.redhat.com/errata/RHSA-2026:1842 Added Reference https://access.redhat.com/errata/RHSA-2026:1843 Added Reference https://access.redhat.com/errata/RHSA-2026:2420 Added Reference https://access.redhat.com/errata/RHSA-2026:2421 Added Reference https://access.redhat.com/errata/RHSA-2026:2422 Added Reference https://access.redhat.com/errata/RHSA-2026:2767 Added Reference https://access.redhat.com/errata/RHSA-2026:2768 Added Reference https://access.redhat.com/errata/RHSA-2026:2781 Added Reference https://access.redhat.com/errata/RHSA-2026:2782 Added Reference https://access.redhat.com/errata/RHSA-2026:2783 Added Reference https://access.redhat.com/errata/RHSA-2026:2864 Added Reference https://access.redhat.com/errata/RHSA-2026:2899 Added Reference https://access.redhat.com/errata/RHSA-2026:6402 Added Reference https://access.redhat.com/errata/RHSA-2026:6431 Added Reference https://access.redhat.com/errata/RHSA-2026:7386 Added Reference https://access.redhat.com/errata/RHSA-2026:7387 Added Reference https://access.redhat.com/security/cve/CVE-2025-55131 Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2431350 Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-55131.json -
CVE Modified by [email protected]
Jun. 17, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'nodejs', 'product': 'node', 'versions': [{'status': 'affected', 'version': '20.19.6', 'versionType': 'semver', 'lessThanOrEqual': '20.19.6'}, {'status': 'affected', 'version': '22.21.1', 'versionType': 'semver', 'lessThanOrEqual': '22.21.1'}, {'status': 'affected', 'version': '24.12.0', 'versionType': 'semver', 'lessThanOrEqual': '24.12.0'}, {'status': 'affected', 'version': '25.2.1', 'versionType': 'semver', 'lessThanOrEqual': '25.2.1'}, {'status': 'affected', 'version': '4.0', 'lessThan': '4.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '5.0', 'lessThan': '5.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '6.0', 'lessThan': '6.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '7.0', 'lessThan': '7.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '8.0', 'lessThan': '8.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '9.0', 'lessThan': '9.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '10.0', 'lessThan': '10.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '11.0', 'lessThan': '11.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '12.0', 'lessThan': '12.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '13.0', 'lessThan': '13.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '14.0', 'lessThan': '14.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '15.0', 'lessThan': '15.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '16.0', 'lessThan': '16.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '17.0', 'lessThan': '17.*', 'versionType': 'semver'}, {'status': 'affected', 'version': '18.0', 'lessThan': '18.*', 'versionType': 'semver'}], 'defaultStatus': 'unaffected'}] -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 17, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2025-55131', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-01-22T04:55:31.057208Z'} -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Feb. 26, 2026
Action Type Old Value New Value Added CWE CWE-120 -
New CVE Received by [email protected]
Jan. 20, 2026
Action Type Old Value New Value 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. Added CVSS V3 AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L Added Reference https://nodejs.org/en/blog/vulnerability/december-2025-security-releases
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.