PT-2026-33344 · Julia · Icu Jll

Published 2026-04-06 · Updated 2026-04-06

OSV

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.

Related Identifiers

JLSEC-2026-58

Affected Products

Icu Jll

References · 19

• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6 · Vendor Advisory
• https://debian.org/security/2020/dsa-4646 · Vendor Advisory
• https://osv.dev/vulnerability/JLSEC-2026-58 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X3B5RWJQD5LA45MYLLR55KZJOJ5NVZGP · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6IOHSO6BUKC6I66J5PZOMAGFVJ66ZS57 · Vendor Advisory
• https://github.com/unicode-org/icu/pull/971 · Note
• https://github.com/unicode-org/icu/commit/b7d08bc04a4296982fcef8b6b8a354a9e4e7afca · Note
• https://oracle.com/security-alerts/cpujan2021.html · Note
• https://chromium.googlesource.com/chromium/deps/icu/+/9f4020916eb1f28f3666f018fdcbe6c9a37f0e08 · Note
• https://lists.debian.org/debian-lts-announce/2020/03/msg00024.html · Note
• https://usn.ubuntu.com/4305-1 · Note
• https://chromereleases.googleblog.com/2020/02/stable-channel-update-for-desktop_24.html · Note
• http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00004.html · Note
• https://oracle.com/security-alerts/cpuapr2022.html · Note
• https://bugs.chromium.org/p/chromium/issues/detail?id=1044570 · Note