CVE-2025-5222

Icu: stack buffer overflow in the srbroot::addtag function

HIGH
7
CVSS Score
Published: May 27, 2025 at 08:51 PM UTC
Updated: October 21, 2026 at 09:17 PM UTC
4 products affected across 3 vendorsInternational Components for UnicodeEnterprise LinuxOpenShift Container Platform

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Severity
HIGH7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 77.1
Affected range stops below 77.1, so it looks safe — our inference, not a vendor statement
All versions8
Vendor states this is fixed in 0:67.1-10.el9_0 (unaffected)
Vendor states this is fixed in 0:67.1-10.el9_2 (unaffected)
Vendor states this is fixed in 0:67.1-10.el9_4 (unaffected)
Vendor states this is fixed in 0:67.1-10.el9_6 (unaffected)
Vendor states this is fixed in 0:74.2-5.el10_0 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)
All versions4
Vendor states this is fixed in 4.19.9.6.202608120446-0 (unaffected)
Vendor states this is fixed in 4.20.9.6.202608121719-0 (unaffected)
Vendor states this is fixed in 413.92.202609080414-0 (unaffected)
Vendor states this is fixed in 414.92.202608172040-0 (unaffected)
Vendor states this is fixed in 415.92.202608180329-0 (unaffected)
Vendor states this is fixed in 416.94.202608150307-0 (unaffected)
Vendor states this is fixed in 417.94.202608250221-0 (unaffected)
Vendor states this is fixed in 418.94.202608111829-0 (unaffected)
v < V7.26.0310
Affected range stops below V7.26.0310, so it looks safe — our inference, not a vendor statement

References (18)

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7HIGHredhat
Attack Vector
LOCAL
Complexity
HIGH
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-120

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