CVE-2012-4420

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 4.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2019-12-26 · updated 2026-06-16
Weakness: CWE-200

Description

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.

Affected products

Oracle Java SE: 7.0

References

http://www.openwall.com/lists/oss-security/2012/09/13/3
http://www.securityfocus.com/bid/55538
https://access.redhat.com/security/cve/cve-2012-4420
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=7196857
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-4420
https://exchange.xforce.ibmcloud.com/vulnerabilities/78693
https://www.openwall.com/lists/oss-security/2012/09/12/4
http://www.openwall.com/lists/oss-security/2012/09/13/3
http://www.securityfocus.com/bid/55538
https://access.redhat.com/security/cve/cve-2012-4420
https://bugs.java.com/bugdatabase/view_bug.do?bug_id=7196857
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2012-4420

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