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VulnerabilityPublished Updated

CVE-2025-5222: Internationl components · Stack Buffer Overflow Was Found

Affects icuSource GCVE Database

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Authoritative record:CVE-2025-5222· High 7.0

Not known to be exploited · CVSS 7.0 High.

Data as of 9 Nov 2026, 14:34 UTC

CVSS 3.1 base score
7.0High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.17.0
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 May 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Ubuntu 25.10icupkg:deb/ubuntu/icu?arch=source&distro=questingOther threatsAffected
  • =76.1-1ubuntu2
  • =76.1-4ubuntu1
  • =76.1-4ubuntu2
Fixed in–
Ubuntu 24.04 LTSicupkg:deb/ubuntu/icu?arch=source&distro=nobleOther threatsAffected
  • 72.1-3ubuntu3 – 74.2-1ubuntu3.1
5 affected builds
Fixed in–
Ubuntu 22.04 LTSicupkg:deb/ubuntu/icu?arch=source&distro=jammyOther threatsAffected
  • =67.1-7ubuntu1
  • =70.1-2
Fixed in–
Ubuntu 20.04 LTSicupkg:deb/ubuntu/icu?arch=source&distro=focalOther threatsAffected
  • 63.2-2 – 66.1-2ubuntu2.1
4 affected builds
Fixed in–
Ubuntu 18.04 LTSicupkg:deb/ubuntu/icu?arch=source&distro=bionicOther threatsAffected
  • 57.1-6 – 60.2-3ubuntu3.2
8 affected builds
Fixed in–
Ubuntu Pro 16.04 LTSicupkg:deb/ubuntu/icu?arch=source&distro=esm-infra/xenialOther threatsAffected
  • 55.1-4ubuntu1 – 55.1-7ubuntu0.5+esm1
9 affected builds
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Until a fix is available, restrict local access to systems running affected ICU versions and avoid running untrusted code that invokes the genrb binary.

Description

A stack buffer overflow vulnerability exists in the International Components for Unicode (ICU) library. The flaw occurs in the genrb binary within the SRBRoot::addTag function, where the 'subtag' struct overflows. This vulnerability can lead to memory corruption and potentially allow local arbitrary code execution. It affects multiple specific versions of ICU as listed. The vulnerability has a high severity rating with a CVSS score of 7.0.

References

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