Bug 2557757 (CVE-2026-83378)

Summary: CVE-2026-83378 openjdk: Improve C2 loop transformations (Oracle CPU 2026-10)
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: ahughes, fferrari, khosford, mtorre, pjindal, rhel-process-autobot, tfitzsim, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in OpenJDK. An unauthenticated remote attacker could exploit this vulnerability by submitting specially crafted input to Compiler component APIs (Application Programming Interfaces), such as through a web service. A successful attack can allow unauthorized modification or deletion of accessible application data, as well as unauthorized read access to sensitive information.
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Description OSIDB Bzimport 2026-10-21 00:27:52 UTC
Vulnerability in Oracle Java SE (component: Compiler).  Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and  27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE.  Successful attacks of this vulnerability can result in  unauthorized update, insert or delete access to some of Oracle Java SE accessible data as well as  unauthorized read access to a subset of Oracle Java SE accessible data. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 4.8 (Confidentiality and Integrity impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N).