Buffer overflow in Unicode International Components For
CVE-2025-5222
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
- Unicode International Components For
- Red Hat Enterprise Linux 10 — versions 0:74.2-5.el10_0
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9 — versions 0:67.1-10.el9_6
- Red Hat Enterprise Linux 9.0 Update Services For SAP Solutions — versions 0:67.1-10.el9_0
- Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions — versions 0:67.1-10.el9_2
- Red Hat Enterprise Linux 9.4 Extended Update Support — versions 0:67.1-10.el9_4
- Red Hat In-Vehicle Operating System 1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2025:11888 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2025:12083 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2025:12331 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2025:12332 (vendor-advisory, Vendor Advisory)
- access.redhat.com/errata/RHSA-2025:12333 (vendor-advisory, Vendor Advisory)
- access.redhat.com/security/cve/CVE-2025-5222 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- unicode-org.atlassian.net/jira/software/c/projects/ICU/issues/ICU-22957
- af854a3a-2127-422b-91ae-364da2661108 (Mailing List)
- 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
Frequently asked questions
- What is CVE-2025-5222?
- CVE-2025-5222 is a high-severity vulnerability in Unicode International Components For, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.0/10. Published 2025-05-27.
- How severe is CVE-2025-5222?
- High severity. CVSS v3 base score is 7.0 out of 10.
- Is CVE-2025-5222 known to be exploited?
- 7 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.