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Fencer Vulns
high 7.1

CVE-2025-55131 json

A flaw in Node.js's buffer allocation logic can expose uninitialized memory when allocations are interrupted, when using the `vm` module wi…

published 2026-01-20 9 mo ago modified 2026-07-15 3 mo ago also BIT-node-2025-55131 , BIT-node-min-2025-55131 , EUVD-2026-3331

cvss
7.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
3.5%
EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits
0
none known

Summary

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.

Patch / fix

  • bitnami node 20.20.0, 22.22.0, 24.13.0, 25.3.0
  • bitnami node-min 20.20.0, 22.22.0, 24.13.0, 25.3.0
  • Red Hat Red Hat Enterprise Linux 10 1:22.22.0-3.el10_1, 1:24.13.0-1.el10_1
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support 1:22.22.0-1.el10_0
  • Red Hat Red Hat Enterprise Linux 8 8100020260116121421.6d880403, 8100020260119091831.6d880403, 8100020260119100525.489197e6
  • Red Hat Red Hat Enterprise Linux 9 9070020260117213748.rhel9, 9070020260117213814.rhel9, 9070020260117213838.rhel9
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 9040020260211171433.rhel9
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support 9060020260210120402.rhel9, 9060020260210180816.rhel9
  • Red Hat Red Hat Hardened Images 20.20.0-7.1.hum1, 22.22.0-1.3.hum1, 24.14.1-4.1.hum1, 24.14.1-4.hum1, 25.9.0-1.1.hum1, 25.9.0-1.hum1
  • nodejs Debian 12 18.20.4+dfsg-1~deb12u2
  • nodejs Debian 13 20.19.2+dfsg-1+deb13u1
  • nodejs Debian 14 22.22.0+dfsg+~cs22.19.6-1

debian advisories DEBIAN-CVE-2025-55131

  • nodejs24 hummingbird 1 24.14.1-4.1.hum1
  • nodejs24-bin hummingbird 1 24.14.1-4.1.hum1
  • nodejs24-npm hummingbird 1 11.11.0-1.24.14.1.4.1.hum1
  • nodejs24-libs hummingbird 1 24.14.1-4.1.hum1
  • nodejs24-npm-bin hummingbird 1 24.14.1-4.1.hum1
  • nodejs24-full-i18n hummingbird 1 24.14.1-4.1.hum1
  • nodejs20 hummingbird 1 20.20.0-7.1.hum1
  • nodejs20-bin hummingbird 1 20.20.0-7.1.hum1

red hat advisories RHSA-2026:7657RHSA-2026:7386RHSA-2026:7387RHSA-2026:7378RHSA-2026:6431RHSA-2026:6402

  • nodejs16 SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 16.20.2-150400.3.42.1
  • nodejs18 SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 18.20.8-150400.9.39.1
  • nodejs22 SLES for SAP applications 16.0, SLES 16.0 22.22.0-160000.1.1
  • nodejs20 SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 20.20.0-150500.11.24.1
  • nodejs20 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, openSUSE Leap 15.6 20.20.0-150600.3.15.1
  • nodejs22 SLE Module for Web and Scripting 15 SP7 22.22.0-150700.3.6.1
  • nodejs22 SLES for SAP 15 SP6, SLES 15 SP6-LTSS, openSUSE Leap 15.6 22.22.0-150600.13.12.1
  • nodejs18 SLES LTSS Extended Security 12 SP5, SLES 12 SP5-LTSS 18.20.8-8.44.1

suse advisories SUSE-SU-2026:4355-1SUSE-SU-2026:4261-1SUSE-SU-2026:4248-1SUSE-SU-2026:20436-1SUSE-SU-2026:0457-1SUSE-SU-2026:0435-1

  • nodejs26 openSUSE Tumbleweed 26.3.1-1.1
  • nodejs22 openSUSE Leap 16.0 22.22.0-160000.1.1
  • nodejs22 openSUSE Tumbleweed 22.22.0-1.1
  • nodejs24 openSUSE Tumbleweed 24.13.0-1.1

opensuse advisories openSUSE-SU-2026:11110-1openSUSE-SU-2026:20236-1openSUSE-SU-2026:10074-1openSUSE-SU-2026:10062-1

  • npm AlmaLinux 9 1:11.6.2-1.24.13.0.1.module_el9.7.0+209+ecf6523e
  • nodejs AlmaLinux 9 1:24.13.0-1.module_el9.7.0+209+ecf6523e
  • nodejs-libs AlmaLinux 9 1:24.13.0-1.module_el9.7.0+209+ecf6523e
  • nodejs-nodemon AlmaLinux 9 3.0.3-3.module_el9.7.0+209+ecf6523e
  • nodejs-full-i18n AlmaLinux 9 1:24.13.0-1.module_el9.7.0+209+ecf6523e
  • nodejs-packaging AlmaLinux 9 2021.06-6.module_el9.7.0+209+ecf6523e
  • nodejs-packaging-bundler AlmaLinux 9 2021.06-6.module_el9.7.0+198+8bf605ba
  • npm AlmaLinux 9 1:10.9.4-1.22.22.0.1.module_el9.7.0+208+fb06c0ab

almalinux advisories ALSA-2026:2781ALSA-2026:2782ALSA-2026:2783ALSA-2026:2420ALSA-2026:2421ALSA-2026:2422

  • nodejs-nodemon Rocky Linux 9 3.0.3-3.module+el9.7.0+40025+0e0cf6b2
  • nodejs-packaging Rocky Linux 9 2021.06-6.module+el9.7.0+40052+e32ea525
  • nodejs-nodemon Rocky Linux 9 3.0.1-1.module+el9.7.0+40017+f0db1785
  • nodejs-nodemon Rocky Linux 9 3.0.1-1.module+el9.7.0+40022+9ecc286c
  • nodejs-nodemon Rocky Linux 9 3.0.1-1.module+el9.7.0+40018+a011993d
  • nodejs-packaging Rocky Linux 9 2021.06-5.module+el9.7.0+40050+22a42328
  • nodejs-packaging Rocky Linux 9 2021.06-5.module+el9.7.0+40051+f2ef3f49
  • nodejs Rocky Linux 8 1:24.13.0-0.module+el8.10.0+40079+1d83e08b

rocky linux advisories RLSA-2026:2781RLSA-2026:2782RLSA-2026:2783RLSA-2026:2420RLSA-2026:2421RLSA-2026:2422

  • nodejs Alpine 3.21 22.22.2-r0
  • nodejs Alpine 3.22 22.22.0-r0
  • nodejs Alpine 3.24, Alpine 3.23 24.13.0-r0

alpine advisories ALPINE-CVE-2025-55131

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • nodejs18 CBL-Mariner 2.0 18.20.3-11
  • nodejs Azure Linux 3.0 20.14.0-13

azure linux advisories AZL-74967AZL-74979

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-55131 updated cvss 7.1

nodejs: Nodejs uninitialized memory exposure

  • Red Hat Enterprise Linux AppStream (v. 8) nodejs 20.20.0-1.module+el8.10.0+23905+c49b2aec, nodejs 22.22.0-1.module+el8.10.0+23904+2c92f862, nodejs 24.13.0-0.module+el8.10.0+23888+24fa7806, nodejs-libs 22.22.0-1.module+el8.10.0+23904+2c92f862, nodejs-libs 24.13.0-0.module+el8.10.0+23888+24fa7806, nodejs-nodemon 3.0.1-1.module+el8.10.0+23474+222d264a, +14 more
    fixed: vendor fix RHSA-2026:2422
  • Red Hat Enterprise Linux AppStream (v. 9) nodejs 20.20.0-1.module+el9.7.0+23895+0637d423, nodejs 22.22.0-1.module+el9.7.0+23896+b5802de9, nodejs 24.13.0-1.module+el9.7.0+23894+c8377628, nodejs-libs 22.22.0-1.module+el9.7.0+23896+b5802de9, nodejs-libs 24.13.0-1.module+el9.7.0+23894+c8377628, nodejs-nodemon 3.0.1-1.module+el9.7.0+23895+0637d423, +14 more
    fixed: vendor fix RHSA-2026:2783
  • Red Hat Enterprise Linux AppStream (v. 10) nodejs 22.22.0-3.el10_1, nodejs22 22.22.0-3.el10_1, nodejs24 24.13.0-1.el10_1, nodejs-libs 22.22.0-3.el10_1, nodejs24-libs 24.13.0-1.el10_1, nodejs-full-i18n 22.22.0-3.el10_1, +3 more
    fixed: vendor fix RHSA-2026:1843
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) nodejs 22.22.0-1.el10_0, nodejs22 22.22.0-1.el10_0, nodejs-libs 22.22.0-1.el10_0, nodejs-full-i18n 22.22.0-1.el10_0, nodejs-npm 10.9.4-1.22.22.0.1.el10_0
    fixed: vendor fix RHSA-2026:2899
  • Red Hat Enterprise Linux AppStream EUS (v.9.4) nodejs 20.20.0-1.module+el9.4.0+23992+5dc31998, npm 10.8.2-1.20.20.0.1.module+el9.4.0+23992+5dc31998, nodejs-nodemon 3.0.1-1.module+el9.3.0.z+20478+84a9f781, nodejs-full-i18n 20.20.0-1.module+el9.4.0+23992+5dc31998, nodejs-packaging 2021.06-4.module+el9.3.0+19518+63aad52d, nodejs-packaging-bundler 2021.06-4.module+el9.3.0+19518+63aad52d
    fixed: vendor fix RHSA-2026:2768
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) nodejs 20.20.0-1.module+el9.6.0+23988+6b9eae47, nodejs 22.22.0-1.module+el9.6.0+23985+21730e4b, nodejs-libs 22.22.0-1.module+el9.6.0+23985+21730e4b, nodejs-nodemon 3.0.1-1.module+el9.6.0+23146+be9976bd, nodejs-nodemon 3.0.1-1.module+el9.6.0+23473+45664c2d, npm 10.8.2-1.20.20.0.1.module+el9.6.0+23988+6b9eae47, +7 more
    fixed: vendor fix RHSA-2026:2767
  • Red Hat Hardened Images nodejs25 25.9.0-1.hum1, nodejs24 24.14.1-4.hum1, nodejs25 25.9.0-1.1.hum1, nodejs20 20.20.0-7.1.hum1, nodejs22 22.22.0-1.3.hum1, nodejs24 24.14.1-4.1.hum1, +30 more
    fixed: vendor fix RHSA-2026:7386
  • Red Hat Hardened Images v8-14.1-devel 14.1.146.11-1.25.9.0.1.hum1, v8-13.6-devel 13.6.233.17-1.24.14.1.4.hum1, v8-11.3-devel 11.3.244.8-1.20.20.0.7.1.hum1, v8-14.1-devel 14.1.146.11-1.25.9.0.1.1.hum1, v8-12.4-devel 12.4.254.21-1.22.22.0.1.3.hum1, v8-13.6-devel 13.6.233.17-1.24.14.1.4.1.hum1
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
9 mo ago

Exploit prediction

3.45% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.0 7.1 CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
CISA ADP 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
CNA 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
OSV 3.1 7.1 CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L

Affected packages

ecosystem package affected fixed in
bitnami node
<20.20.0
>=21.0.0, <22.22.0
>=23.0.0, <24.13.0
>=25.0.0, <25.3.0
20.20.0
22.22.0
24.13.0
25.3.0
bitnami node-min
<20.20.0
>=21.0.0, <22.22.0
>=23.0.0, <24.13.0
>=25.0.0, <25.3.0
20.20.0
22.22.0
24.13.0
25.3.0

Affected products

  • nodejs node
  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support
  • Red Hat Red Hat Enterprise Linux 9.6 Extended Update Support
  • Red Hat Red Hat Hardened Images

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input
  • CWE-497 Exposure of Sensitive System Information to an Unauthorized Control Sphere
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.