{"cve":"CVE-2025-27821","nvd":{"published":"2026-01-26T10:16:05.033","modified":"2026-06-17T09:04:16.920","status":"Analyzed","description":"Out-of-bounds Write vulnerability in Apache Hadoop HDFS native client.\n\nThis issue affects Apache Hadoop: from 3.2.0 before 3.4.2.\n\nUsers are recommended to upgrade to version 3.4.2, which fixes the issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","score":7.3},"cwes":["CWE-787"],"references":["https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh","http://www.openwall.com/lists/oss-security/2026/01/23/7"],"products":["apache:hadoop"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2025-27821","score":0.00906,"percentile":0.59871,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-92cc-952p-v8rh","url":"https://osv.dev/vulnerability/GHSA-92cc-952p-v8rh","summary":"Apache Hadoop HDFS Native Client has Out-of-bounds Write Vulnerability ","modified":"2026-02-03T03:07:43.476697Z","packages":[{"ecosystem":"Maven","name":"org.apache.hadoop:hadoop-hdfs-native-client","purl":"pkg:maven/org.apache.hadoop/hadoop-hdfs-native-client","ranges":[">=3.2.0 <3.4.2"],"fixed":["3.4.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}