CVE-2025-27821

HDFS native client: Out of bounds write in URI parser of native HDFS client

State: Published
Severity: 7.3 High
Published: Jan 26, 2026
Updated: Jan 26, 2026
Reserved: Mar 7, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L	CISA-ADP

Weaknesses

CWE-787 Out-of-bounds Write

Affected Products

Product	Versions
HDFS native clientApache Software Foundation	3.2.0 to before 3.4.2Affected

References

https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplhvendor-advisory
http://www.openwall.com/lists/oss-security/2026/01/23/7

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