Vulnerability Report

CVE-2025-27821

Title: Out-of-bounds Write in Apache Hadoop HDFS native client

Memory Corruption

Proof Of Concept

No public PoC currently indexed for CVE-2025-27821.

CWE Category CWE-787
Published Date Jan 26, 2026
Modified Date Jan 27, 2026
Exploit Status Not Found
Score 7.3 CVSS v
Exploit Probability (EPSS)
0.04%

Vulnerability Summary

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.

Impacted Vendors

C
cloudera 1
A
apache 1

Reference Links

https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh http://www.openwall.com/lists/oss-security/2026/01/23/7
CVSS v3.1
Source Entity 134c704f-9b21-4f2e-91b3-4a467353bcc0
Severity HIGH
7.3
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2025-27821 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Affected Stack

No specific products linked.