CVE-2025-27821 json
HDFS native client: Out of bounds write in URI parser of native HDFS client
published 9mo ago modified 4mo ago also GHSA-92cc-952p-v8rh , EUVD-2025-206351
- cvss
- 7.3
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.9%
- EPSS 0.9% chance of exploitation in 30 days, percentile 60%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- maven org.apache.hadoop:hadoop-hdfs-native-client 3.4.2
- Apache Software Foundation HDFS native client 3.4.2
- github.com/apache/hadoop@2b32e46 commit
- github.com/apache/hadoop#7481 pull request
Is CVE-2025-27821 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.
Check with FencerCISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 9mo ago
Exploit prediction
0.91% chance of exploitation in the next 30 days, higher than 60% of all scored CVEs (FIRST EPSS, 2026-11-09).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| CNA | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
| GitHub | 3.1 | 7.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| maven | org.apache.hadoop:hadoop-hdfs-native-client | >=3.2.0, <3.4.2 |
3.4.2 |
Affected products
- Apache Software Foundation HDFS native client
Classification
- Weakness
-
- CWE-787 Out-of-bounds Write
References
-
github.com
/apache/hadoop/pull/7481
web
-
github.com
/apache/hadoop/commit/2b32e46f666c7645f5d1e026be3982b99319ccb8
web
-
lists.apache.org
/thread/kwjhyyx0wl2z9b0mw0styjk0hhdbyplh
vendor-advisory, web, mailing-list
-
openwall.com
/lists/oss-security/2026/01/23/7
web, mailing-list, third-party-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2025-27821
advisory
-
github.com
/apache/hadoop
package
-
issues.apache.org
/jira/browse/HDFS-17754
web
Sources
- CVE List CVE-2025-27821
- GitHub Advisory GHSA-92cc-952p-v8rh
- NVD CVE-2025-27821
Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.