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

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.

Classification

CVE ID: CVE-2025-5222

Problem Types

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Vendor: Red Hat

Product: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.02% (probability of being exploited)

EPSS Percentile: 4.43% (scored less or equal to compared to others)

EPSS Date: 2025-06-25 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-5222
https://access.redhat.com/security/cve/CVE-2025-5222
https://bugzilla.redhat.com/show_bug.cgi?id=2368600

Timeline