{"id":"CVE-2025-27821","summary":"HDFS native client: Out of bounds write in URI parser of native HDFS client","details":"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.","aliases":["GHSA-92cc-952p-v8rh"],"modified":"2026-08-12T04:08:41.797965276Z","published":"2026-01-26T09:44:13.532Z","database_specific":{"cwe_ids":["CWE-787"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27821.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"3.2.0"},{"fixed":"3.4.2"}]},{"extracted_events":[{"introduced":"3.2.0"},{"fixed":"3.4.2"}],"source":"DESCRIPTION"}],"cna_assigner":"apache"},"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/01/23/7"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/27xxx/CVE-2025-27821.json"},{"type":"ADVISORY","url":"https://lists.apache.org/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-27821"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/hadoop","events":[{"introduced":"e97acb3bd8f3befd27418996fa5d4b50bf2e17bf"},{"fixed":"84e8b89ee2ebe6923691205b9e171badde7a495c"},{"introduced":"7e73321f9e1c7c5a3c41da3265f1666a8e76c0a8"},{"introduced":"a446949f568ed0269741f258bb50b3b4f95db142"},{"introduced":"bba76b6f31d5452fe048dcc6853c12a1894024fe"},{"fixed":"76ed292afdcfd7bfc82efbd69b4e4fbc38323272"},{"fixed":"c6ed605a3fa7d145fe9a8213d7ce11e63f63cca8"}],"database_specific":{"cpe":"cpe:2.3:a:apache:hadoop:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"3.2.0"},{"fixed":"3.4.2"}],"source":"CPE_RANGE"}}],"versions":["release-3.2.4-RC0","rel/release-3.2.4","release-3.2.3-RC1","rel/release-3.2.3","release-3.2.3-RC0","release-3.2.2-RC5","rel/release-3.2.2","release-3.2.2-RC4","release-3.2.2-RC3","release-3.2.2-RC2","release-3.2.2-RC1","release-3.2.2-RC0","release-3.1.4-RC4","rel/release-3.1.4","release-3.1.4-RC3","release-3.1.4-RC2","release-3.1.4-RC1","release-3.1.4-RC0","release-3.2.1-RC0","rel/release-3.2.1","release-3.1.3-RC0","rel/release-3.1.3","release-3.2.0-RC1","rel/release-3.2.0","release-3.1.2-RC1","rel/release-3.1.2","release-3.1.2-RC0"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-27821.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L"}]}