CVE-2025-27821

7.3 HIGH

Published: January 26, 2026 Modified: January 27, 2026

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0

Vector String

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory

https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh

Source: security@apache.org

Mailing List Vendor Advisory

http://www.openwall.com/lists/oss-security/2026/01/23/7

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing List Third Party Advisory

2 reference(s) from NVD

Quick Stats

CVSS v3 Score

7.3 / 10.0

EPSS (Exploit Probability)

0.0%

14th percentile

Exploitation Status

Not in CISA KEV

Weaknesses (CWE)

CWE-787

Affected Vendors

apache

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