CVE-2020-10531

Name: CVE-2020-10531
Creator: NVD / NIST
Published: 2020-03-12T19:15:13.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 2.67%

Last modified Jun 17, 2026

CVE-2020-10531 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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() function in common/unistr.cpp.. EPSS estimates a 2.67% chance of exploitation in the next 30 days.

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() function in common/unistr.cpp.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Probability

2.67%

83.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Icu-Project	International Components For Unicode	<= 66.1
Redhat	Enterprise Linux Desktop	6.0
Redhat	Enterprise Linux Server	6.0
Redhat	Enterprise Linux Workstation	6.0
Google	Chrome	< 80.0.3987.122
Fedoraproject	Fedora	30
Fedoraproject	Fedora	31
Fedoraproject	Fedora	33
Debian	Debian Linux	8.0
Debian	Debian Linux	9.0
Debian	Debian Linux	10.0
Canonical	Ubuntu Linux	12.04
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	18.04
Canonical	Ubuntu Linux	19.10
Opensuse	Leap	15.1
Oracle	Banking Extensibility Workbench	14.3.0
Oracle	Banking Extensibility Workbench	14.4.0
Nodejs	Node.Js	>= 10.0.0, <= 10.12.0
Nodejs	Node.Js	>= 10.13.0, < 10.21.0

References

http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00004.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0738Third Party Advisory
https://bugs.chromium.org/p/chromium/issues/detail?id=1044570Permissions Required, Third Party Advisory
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.htmlThird Party Advisory
https://chromium.googlesource.com/chromium/deps/icu/+/9f4020916eb1f28f3666f018fdcbe6c9a37f0e08Patch, Third Party Advisory
https://github.com/unicode-org/icu/commit/b7d08bc04a4296982fcef8b6b8a354a9e4e7afcaPatch, Third Party Advisory
https://github.com/unicode-org/icu/pull/971Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00024.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
https://security.gentoo.org/glsa/202003-15Third Party Advisory
https://unicode-org.atlassian.net/browse/ICU-20958Permissions Required, Third Party Advisory
https://usn.ubuntu.com/4305-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4646Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlNot Applicable, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00004.htmlMailing List, Third Party Advisory
https://access.redhat.com/errata/RHSA-2020:0738Third Party Advisory
https://bugs.chromium.org/p/chromium/issues/detail?id=1044570Permissions Required, Third Party Advisory
https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.htmlThird Party Advisory
https://chromium.googlesource.com/chromium/deps/icu/+/9f4020916eb1f28f3666f018fdcbe6c9a37f0e08Patch, Third Party Advisory
https://github.com/unicode-org/icu/commit/b7d08bc04a4296982fcef8b6b8a354a9e4e7afcaPatch, Third Party Advisory
https://github.com/unicode-org/icu/pull/971Issue Tracking, Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2020/03/msg00024.htmlMailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP/
https://security.gentoo.org/glsa/202003-15Third Party Advisory
https://unicode-org.atlassian.net/browse/ICU-20958Permissions Required, Third Party Advisory
https://usn.ubuntu.com/4305-1/Third Party Advisory
https://www.debian.org/security/2020/dsa-4646Third Party Advisory
https://www.oracle.com//security-alerts/cpujul2021.htmlNot Applicable, Third Party Advisory
https://www.oracle.com/security-alerts/cpuapr2022.htmlThird Party Advisory
https://www.oracle.com/security-alerts/cpujan2021.htmlPatch, Third Party Advisory

Timeline

Published: Mar 12, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-10531?

How severe is CVE-2020-10531?

CVE-2020-10531 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 2.67% probability of exploitation in the next 30 days.

How do I fix CVE-2020-10531?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-10531?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST