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

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.

Published: 2025-05-27 Last update: 2026-04-23 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-5222 is rated Low Risk (35.7/100): CVSS High severity, with low exploitation likelihood (EPSS 0.30%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-5222

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.02% 0.30% +0.28%
2 2026-03-03 0.05% 0.02% -0.03%
3 2026-02-20 — 0.05% —

Full EPSS history (4 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-5222

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.0 3.1 HIGH
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 1.0 5.9 [email protected]

Weakness enumeration for CVE-2025-5222

GitHub Security Advisory for CVE-2025-5222

GHSA-wv79-2fc4-v4hj · Severity: high — A stack buffer overflow was found in Internationl components for unicode (ICU ). While running...

OS Trackers for CVE-2025-5222

vendor priority summary link
alpine — CVE-2025-5222: 1 source package rows (icu); 6 state rows across 6 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, 3.23-main, edge-main); fixed 6, open 0. https://security.alpinelinux.org/vuln/CVE-2025-5222
debian not yet assigned CVE-2025-5222 not yet assigned priority: Debian including 1 source packages (icu), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2025-5222
redhat medium — https://access.redhat.com/security/cve/CVE-2025-5222
suse high CVE-2025-5222 severity important: SUSE including 321 source package names (14.2-3.12.50:libicu-suse65_1-65.1-150200.4.15.1, 14.2-3.12.50:libicu65_1-ledata-65.1-150200.4.15.1, …), 1033 product×package rows across 250 product lines (Container private-registry/harbor-db, Container suse/manager/5.0/x86_64/server, … (250 product lines)): Fixed 607, Known Affected 231, Known Not Affected 195. https://www.suse.com/security/cve/CVE-2025-5222/
ubuntu low CVE-2025-5222 low priority: Ubuntu including 1 source packages (icu), 10 status rows across 10 suites (bionic, focal, jammy, noble, oracular, plucky, questing, trusty, upstream, xenial): needed 7, ignored 2, released 1. https://ubuntu.com/security/CVE-2025-5222

Affected software / configurations for CVE-2025-5222

Vendor Product Version Raw CPE
unicode international_components_for_unicode < 77.1 cpe:2.3:a:unicode:international_components_for_unicode:*:*:*:*:*:*:*:*

References for CVE-2025-5222

cvelogic Threat Intelligence