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Vulnerability Intelligence

CVE-2025-27821 | Mondoo Vulnerability Intelligence

Vulnerability IntelligenceCVE-2025-27821

CVE-2025-27821

HIGH7.3

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

Published Jan 26, 2026

Modified 1 months ago

Details

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.

References

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

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

https://www.cve.org/CVERecord?id=CVE-2025-27821

CVSS Analysis

CVSS v3.1

7.3

Exploitability

Attack Vector

NetworkAV:N

Attack Complexity

LowAC:L

Privileges Required

NonePR:N

User Interaction

NoneUI:N

Scope

Scope

UnchangedS:U

Impact

Confidentiality

LowC:L

Integrity

LowI:L

Availability

LowA:L

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

Weakness Type (CWE)

Memory Safety

Out-of-bounds Write

Ecosystems

Timeline

PublishedJan 26, 2026

ModifiedJan 26, 2026