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CVE-2025-5222— Icu: stack buffer overflow in the srbroot::addtag function

Quick assessment

Affected
CVE-2025-5222
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

International Components for Unicode（icu）是The Unicode Consortium开源的一套成熟且广泛使用的 C/C++ 和 Java 库，为软件应用程序提供 Unicode 和全球化支持。 International Components for Unicode 76.0.1版本存在安全漏洞，该漏洞源于genrb二进制中subtag结构溢出，可能导致内存损坏和本地任意代码执行。

CVSS 7.0 · High EPSS 0.38% · P31

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 15

VendorProduct Version RangeStatus
None None < 78.1 affected
Red Hat Red Hat Enterprise Linux 10 0:74.2-5.el10_0< * unaffected
Red Hat Red Hat Enterprise Linux 6 any unknown
Red Hat Red Hat Enterprise Linux 7 any unknown
Red Hat Red Hat Enterprise Linux 8 any affected
any affected
Red Hat Red Hat Enterprise Linux 9 0:67.1-10.el9_6< * unaffected
0:67.1-10.el9_6< * unaffected
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:67.1-10.el9_0< * unaffected
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:67.1-10.el9_2< * unaffected
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:67.1-10.el9_4< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202608111829-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202608120446-0< * unaffected
Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202608121719-0< * unaffected

I. Basic Information for CVE-2025-5222

Vulnerability Information
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Vulnerability Title
Icu: stack buffer overflow in the srbroot::addtag function
Source: CVE Program / CVE List V5
Vulnerability Description
A stack buffer overflow was found in Internationl components for unicode (ICU ). While running the genrb binary, the 'subtag' struct overflowed at the SRBRoot::addTag function. This issue may lead to memory corruption and local arbitrary code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
未进行输入大小检查的缓冲区拷贝(传统缓冲区溢出)
Source: CVE Program / CVE List V5
Vulnerability Title
International Components for Unicode 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
International Components for Unicode（icu）是The Unicode Consortium开源的一套成熟且广泛使用的 C/C++ 和 Java 库，为软件应用程序提供 Unicode 和全球化支持。 International Components for Unicode 76.0.1版本存在安全漏洞，该漏洞源于genrb二进制中subtag结构溢出，可能导致内存损坏和本地任意代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 78.1 -
Red Hat Red Hat Enterprise Linux 10 0:74.2-5.el10_0 ~ * cpe:/o:redhat:enterprise_linux:10.0
Red Hat Red Hat Enterprise Linux 9 0:67.1-10.el9_6 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:67.1-10.el9_6 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions 0:67.1-10.el9_0 ~ * cpe:/a:redhat:rhel_e4s:9.0::appstream
Red Hat Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:67.1-10.el9_2 ~ * cpe:/a:redhat:rhel_e4s:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.4 Extended Update Support 0:67.1-10.el9_4 ~ * cpe:/a:redhat:rhel_eus:9.4::appstream
Red Hat Red Hat OpenShift Container Platform 4.18 418.94.202608111829-0 ~ * cpe:/a:redhat:openshift:4.18::el9
Red Hat Red Hat OpenShift Container Platform 4.19 4.19.9.6.202608120446-0 ~ * cpe:/a:redhat:openshift:4.19::el9
Red Hat Red Hat OpenShift Container Platform 4.20 4.20.9.6.202608121719-0 ~ * cpe:/a:redhat:openshift:4.20::el9
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2025-5222

# POC Description Source Link Shenlong Link
1 Debian build files for icu 74.2 with a patch to fix CVE-2025-5222 https://github.com/berkley4/icu-74-debian POC Details
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III. Intelligence Information for CVE-2025-5222

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Vendor Advisories for CVE-2025-5222 (8)

Other References for CVE-2025-5222 (1)

IV. Related Vulnerabilities

Same weakness: CWE-120

V. Comments for CVE-2025-5222

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