SB2026012411 - Denial of service in Apache Hadoop HDFS native client
Published: January 24, 2026
Security Bulletin ID
SB2026012411
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Out-of-bounds write (CVE-ID: CVE-2025-27821)
CWE-ID: CWE-787 - Out-of-bounds write
CVSSv4: 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/E:U/U:Clear
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.
Remediation
Install update from vendor's website.