Bug 2557356 (CVE-2026-91373) - CVE-2026-91373 openjdk: Enhance TLS handshakes (Oracle CPU 2026-10)
Summary: CVE-2026-91373 openjdk: Enhance TLS handshakes (Oracle CPU 2026-10)
Keywords:
Status: NEW
Alias: CVE-2026-91373
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-21 00:02 UTC by OSIDB Bzimport
Modified: 2026-10-27 20:18 UTC (History)
8 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:88347 0 None None None 2026-10-27 20:18:23 UTC
Red Hat Product Errata RHSA-2026:88352 0 None None None 2026-10-27 16:29:44 UTC
Red Hat Product Errata RHSA-2026:88353 0 None None None 2026-10-27 19:53:31 UTC
Red Hat Product Errata RHSA-2026:89916 0 None None None 2026-10-27 19:53:01 UTC

Description OSIDB Bzimport 2026-10-21 00:02:28 UTC 
Vulnerability in Oracle Java SE (component: JSSE).  Supported versions that are affected are Oracle Java SE: 8u503, 8u503-perf, 11.0.32.1, 17.0.20.1, 21.0.12.1, 25.0.4.1; Oracle GraalVM for JDK: 17.0.20.1 and  21.0.12.1; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise Oracle Java SE.  Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 5.3 (Availability impacts).  CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
Comment 1 Jon Orris 2026-10-27 16:29:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8
  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On
  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:88352 https://access.redhat.com/errata/RHSA-2026:88352
Comment 2 Jon Orris 2026-10-27 19:53:00 UTC 
This issue has been addressed in the following products:

  Red Hat Build of OpenJDK 17.0.20.1

Via RHSA-2026:89916 https://access.redhat.com/errata/RHSA-2026:89916
Comment 3 Jon Orris 2026-10-27 19:53:30 UTC 
This issue has been addressed in the following products:

  Red Hat Build of OpenJDK 17.0.21

Via RHSA-2026:88353 https://access.redhat.com/errata/RHSA-2026:88353
Comment 4 Jon Orris 2026-10-27 20:18:22 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9
  Red Hat Enterprise Linux 10

Via RHSA-2026:88347 https://access.redhat.com/errata/RHSA-2026:88347
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