CVE-2025-27821
Apache Hadoop HDFS Native Client has Out-of-bounds Write Vulnerability
7.3
HIGH
CVSS 3.1
EPSS 0.04%
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.
How to fix CVE-2025-27821
To remediate CVE-2025-27821, upgrade the affected package to a fixed version below.
- —upgrade to 3.4.2 or later
Is CVE-2025-27821 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- >= 3.2.0, < 3.4.2
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |