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01 Record

CVE-2020-10531

An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1. An integer overflow, leading to a heap-based buffer overflow, exists in the UnicodeString::doAppend()

UnratedPUBLISHEDCNA: mitre
CNA base scoreUnratedNo CNA CVSS vector
View raw JSON

02 Description

An issue was discovered in International Components for Unicode (ICU) for C/C++ through 66.1. An integer overflow, leading to a heap-based buffer overflow, exists in the UnicodeString::doAppend()

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
2.66% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 85.4% of scored records. A rank, not a probability.
NVD base score
8.8 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-10-14.
Red Hat severity
Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2020-03-12 18:09Z6 YR AGO
Last updated
2026-10-14 08:50Z15 DAYS AGO
Reserved
2020-03-12
Assigning CNA
mitre
Record state
PUBLISHED
Severity
Not rated by the issuing CNA
CNA CVSS vector
Not published by the issuing CNA
Weaknesses
  • CWE-190Integer Overflow or WraparoundBase
  • CWE-787Out-of-bounds WriteBase
Data version
5.2
Document digest
14f6ea0d45fcffcd70b35542a3cecad87071a4c23f1d19eacf05464e63c682e1

05 Affected products

VendorProductVersionsPlatforms
canonicalubuntu_linuxNot specified—
debiandebian_linuxNot specified—
fedoraprojectfedoraNot specified—
googlechromeNot specified—
icu-projectinternational_components_for_unicodeNot specified—
nodejsnode.jsNot specified—
opensuseleapNot specified—
oraclebanking_extensibility_workbenchNot specified—
redhatenterprise_linuxNot specified—
redhatenterprise_linux_desktopNot specified—
redhatenterprise_linux_serverNot specified—
redhatenterprise_linux_workstationNot specified—
redhatrhel_e4sNot specified—
redhatrhel_extrasNot specified—
redhatrhel_software_collectionsNot specified—

06 References

07 Fixed in

AlmaLinux 8

  • icu
    Fixed in 60.3-2.el8_1
  • libicu
    Fixed in 60.3-2.el8_1
  • libicu-devel
    Fixed in 60.3-2.el8_1
  • libicu-doc
    Fixed in 60.3-2.el8_1
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.3-1.module_el8.3.0+2023+d2377ea3
    • Affected before 1.18.3-1.module_el8.3.0+2047+b07ac28e
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 17-3.module_el8.3.0+2023+d2377ea3
    • Affected before 17-3.module_el8.4.0+2224+b07ac28e
    • Affected before 17-3.module_el8.4.0+2521+c668cc9f

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • icu
    Fixed in 60.3-2.el8_1
  • libicu
    Fixed in 60.3-2.el8_1
  • libicu-devel
    Fixed in 60.3-2.el8_1
  • libicu-doc
    Fixed in 60.3-2.el8_1
  • nodejs-nodemon
    Fixed

    A version is affected if any line below covers it.

    • Affected before 1.18.3-1.module_el8.3.0+2023+d2377ea3
    • Affected before 1.18.3-1.module_el8.3.0+2047+b07ac28e
  • nodejs-packaging
    Fixed

    A version is affected if any line below covers it.

    • Affected before 17-3.module_el8.3.0+2023+d2377ea3
    • Affected before 17-3.module_el8.4.0+2224+b07ac28e
    • Affected before 17-3.module_el8.4.0+2521+c668cc9f

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • icu
    Fixed in 63.2-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • icu
    Fixed in 63.2-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • icu
    Fixed in 63.2-3

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 16.04 LTS

  • chromium-browser
    Fixed in 80.0.3987.149-0ubuntu0.16.04.1
  • icu
    Fixed in 55.1-7ubuntu0.5

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 18.04 LTS

  • chromium-browser
    Fixed in 80.0.3987.149-0ubuntu0.18.04.1
  • icu
    Fixed in 60.2-3ubuntu3.1

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • icu
    Fixed in 52.1-3ubuntu0.8+esm1
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.