VulnerabilityAnalyzed
CVE-2025-27821
Out-of-bounds Write vulnerability in Apache Hadoop HDFS native client.
HIGH 7.3EPSS 0.88%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.88%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.3 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
- EPSS
- 0.88% probability · 57th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- apache/hadoop
- Source
- security@apache.org
References
- https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplhMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/01/23/7Mailing List, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.