CVE-2012-4420
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation...
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation of Java SE 7 as provided by OpenJDK 7 incorrectly initialized integer arrays after memory allocation (in certain circumstances they had nonzero elements right after the allocation). A remote attacker could use this flaw to obtain potentially sensitive information.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation of Java SE 7 as provided by OpenJDK 7 incorrectly initialized integer arrays after memory allocation (in certain circumstances they had nonzero elements right after the allocation). A remote attacker could use this flaw to obtain potentially sensitive information.
- Record
CVE-2012-4420- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 5.0 Medium
AV:N/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
CVE List No score
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation of Java SE 7 as provided by OpenJDK 7 incorrectly initialized integer arrays after memory allocation (in certain circumstances they had nonzero elements right after the allocation). A remote attacker could use this flaw to obtain potentially sensitive information.
- Record
CVE-2012-4420- Updated
- 2026-11-02
EUVDEUVD-2012-4355 No score
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation of Java SE 7 as provided by OpenJDK 7 incorrectly initialized integer arrays after memory allocation (in certain circumstances they had nonzero elements right after the allocation). A remote attacker could use this flaw to obtain potentially sensitive information.
- Record
EUVD-2012-4355- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-qmhj-qfmf-95g9
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation...
An information disclosure flaw was found in the way the Java Virtual Machine (JVM) implementation of Java SE 7 as provided by OpenJDK 7 incorrectly initialized integer arrays after memory allocation (in certain circumstances they had nonzero elements right after the allocation). A remote attacker could use this flaw to obtain potentially sensitive information.
- Record
GHSA-qmhj-qfmf-95g9- CVSS 3.1
- 7.5 High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-200
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2012-4420 is a high vulnerability (CVSS 7.5) in Oracle Jdk, published December 26, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.51%, the 91st percentile. No source names a fixed version.
References
bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-4420
access.redhat.com/security/cve/cve-2012-4420
exchange.xforce.ibmcloud.com/vulnerabilities/78693
openwall.com/lists/oss-security/2012/09/13/3
securityfocus.com/bid/55538
bugs.java.com/bugdatabase/view_bug.do?bug_id=7196857
nvd.nist.gov/vuln/detail/CVE-2012-4420
github.com/advisories/GHSA-qmhj-qfmf-95g9