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HIGH

CVE-2025-5222

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

CVSS v3

7

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libicuAlmaLinux:10all versions · fixed in 74.2-5.el10_0and 2 other packages
  • libicuAlmaLinux:9all versions · fixed in 67.1-10.el9_6and 2 other packages

Vendor advisories

  • CVE-2025-5222 Red Hat Product Security294 products fixed · 18 known affected

    icu: Stack buffer overflow in the SRBRoot::addTag function

    icu as a component of Red Hat Enterprise Linux 6 · icu.src as a component of Red Hat Enterprise Linux 6 · libicu as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:65839 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.13.71 bug fix and security update

  • RHSA-2026:60019 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.17.57 bug fix and security update

  • RHSA-2026:56853 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.16.69 bug fix and security update

  • RHSA-2026:56786 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.14.72 bug fix and security update

  • RHSA-2026:56911 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: OpenShift Container Platform 4.15.68 bug fix and security update

10 more advisories

Full record on NVD

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.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2025-05-27
Last Modified
2026-04-23

Frequently asked questions

What is 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.

Is CVE-2025-5222 actively exploited?

Active exploitation of CVE-2025-5222 has not been confirmed. Its EPSS score was 0.4% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-5222?

CVE-2025-5222 has a CVSS v3 base score of 7 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

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