CVE-2025-27821

EUVD-2025-206351
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.3 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CISA-ADPADP
7.3 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 14%
Affected Products (NVD)
VendorProductVersion
apachehadoop
3.2.0 ≤
𝑥
< 3.4.2
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh
http://www.openwall.com/lists/oss-security/2026/01/23/7