CVE-2025-27821

Out-of-bounds Write vulnerability in Apache Hadoop HDFS native client. This issue affects Apache Hadoop: from 3.2.0 before 3.4.2. Users are recommended to upgrade to version 3.4.2, which fixes the issue.

Score

CVSS 3.1 7.3 High

Status

Analyzed - security@apache.org

Published

2026-01-26

Last modified

2026-01-26

Weaknesses

CWE-787

Affected products

• Hadoop (Apache)
• Hdfs Native Client (Apache Software Foundation)

References

• https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh
• http://www.openwall.com/lists/oss-security/2026/01/23/7