Out-of-bounds write in Hadoop - CVE-2025-27821
Published: January 24, 2026
Vulnerability identifier: #VU122008
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2025-27821
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to crash the application.
The vulnerability exists due to a boundary error in the URI parser within the HDFS native client. A local user can pass a specially crafted URI to the application and perform a denial of service attack.
Affected software
Hadoop
Communications Unified Assurance
Oracle Financial Services Model Management and Governance
Communications Unified Assurance
Oracle Financial Services Model Management and Governance
How to mitigate CVE-2025-27821
Install updates from vendor's website.
Hadoop - update to 3.4.2