CVE-2025-27821
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2026-01-26

Last updated on: 2026-01-27

Assigner: Apache Software Foundation

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.
CVSS Scores
EPSS Scores
Probability:
Percentile:
Meta Information
Published
2026-01-26
Last Modified
2026-01-27
Generated
2026-06-16
AI Q&A
2026-01-26
EPSS Evaluated
2026-06-14
NVD
CVE-2025-27821
EUVD
EUVD-2025-206351
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
apache hadoop From 3.2.0 (inc) to 3.4.2 (exc)
Helpful Resources
Exploitability
CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-787 The product writes data past the end, or before the beginning, of the intended buffer.
Attack-Flow Graph
AI Quick Actions
Instant insights powered by AI
Executive Summary

CVE-2025-27821 is a moderate severity out-of-bounds write vulnerability in the URI parser of the Apache Hadoop HDFS native client. It affects versions from 3.2.0 up to, but not including, 3.4.2. This vulnerability allows an out-of-bounds write operation, which could lead to memory corruption or other unintended behavior. The issue has been fixed in version 3.4.2. [1]

Impact Analysis

This vulnerability could lead to memory corruption or other unintended behavior in the Apache Hadoop HDFS native client, potentially causing application crashes, data corruption, or security risks such as arbitrary code execution depending on how the vulnerability is exploited. [1]

Mitigation Strategies

Users are recommended to upgrade Apache Hadoop HDFS native client to version 3.4.2 or later, where the out-of-bounds write vulnerability has been fixed. [1]

Chat Assistant
Ask questions about this CVE
Hi! I’m here to help you understand CVE-2025-27821. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70
EPSS Chart