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CVE-2020-10531

ICU: Integer overflow in UnicodeString::doAppend()

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Severity

Important

Red Hat Product Security

8.8

CVSS 3.1

Review impact separately from score.

Published · February 25, 2020

Updated · October 14, 2026

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.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 8.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-190 · Integer Overflow or Wraparound