Home / mailings [USN-9015-1] OpenJDK 21 vulnerabilities
Posted on 10 November 2026
Ubuntu Security==========================================================================Ubuntu Security Notice USN-9015-1
November 09, 2026
openjdk-21 vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 26.10
- Ubuntu 26.04 LTS
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
Summary:
Several security issues were fixed in OpenJDK 21.
Software Description:
- openjdk-21: Open Source Java implementation
Details:
It was discovered that the Security component of OpenJDK 21 did not
correctly authenticate users. A remote attacker could possibly use this
issue to modify sensitive data. (CVE-2026-83374)
It was discovered that the JSSE component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to modify
sensitive data. (CVE-2026-83376)
It was discovered that the Compiler component of OpenJDK 21 did not
correctly authorize users. An unauthenticated remote attacker could
possibly use this issue to read or modify sensitive data. (CVE-2026-83378)
It was discovered that the JAAS component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to read
sensitive data. (CVE-2026-83380)
It was discovered that the Security component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to read or modify sensitive data. (CVE-2026-83381)
It was discovered that the JDBC component of OpenJDK 21 did not correctly
authenticate users. A remote attacker could possibly use this issue to read
sensitive data. (CVE-2026-83387)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to cause a denial of service or modify sensitive data. (CVE-2026-83395)
It was discovered that the JAXP component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2026-83400)
It was discovered that the JAXP component of OpenJDK 21 did not correctly
authenticate users. A remote attacker could possibly use this issue to read
sensitive data. (CVE-2026-87290)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authorize users. An unauthenticated remote attacker could
possibly use this issue to read sensitive data. (CVE-2026-87291)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to modify sensitive data. (CVE-2026-87292)
It was discovered that the Security component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to read or modify sensitive data. (CVE-2026-87294)
It was discovered that the JAXP component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to modify
sensitive data. (CVE-2026-87367)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to modify sensitive data. (CVE-2026-91332)
It was discovered that the Security component of OpenJDK 21 did not
correctly authorize users. An unauthenticated remote attacker could
possibly use this issue to read or modify sensitive data. (CVE-2026-91333)
It was discovered that the ImageIO component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to read sensitive data. (CVE-2026-91334)
It was discovered that the AWT component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to read
sensitive data. (CVE-2026-91335)
It was discovered that the JSSE component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2026-91373)
It was discovered that the Serviceability component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to read or modify sensitive data. (CVE-2026-91374)
It was discovered that the Libraries component of OpenJDK 21 did not
correctly authenticate users. A local attacker could possibly use this
issue to modify sensitive data. (CVE-2026-91375)
It was discovered that the JDK tools component of OpenJDK 21 did not
correctly authenticate users. A local attacker could possibly use this
issue to modify sensitive data. (CVE-2026-91379)
It was discovered that the Utility component of OpenJDK 21 did not
correctly authorize users. A local attacker could possibly use this issue
to read or modify sensitive data. (CVE-2026-91380)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authenticate users. A remote attacker could possibly use this
issue to read sensitive data. (CVE-2026-91394)
It was discovered that the Serviceability component of OpenJDK 21 did not
correctly authorize users. A local attacker could possibly use this issue
to cause a denial of service or modify sensitive data. (CVE-2026-91397)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authenticate users. A remote attacker could possibly use this
issue to modify sensitive data. (CVE-2026-91398)
It was discovered that the Sound component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2026-91400)
It was discovered that the JSSE component of OpenJDK 21 did not correctly
authenticate users. A remote attacker could possibly use this issue to read
or modify sensitive data. (CVE-2026-91403)
It was discovered that the Libraries component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to cause a denial of service. (CVE-2026-91410)
It was discovered that the 2D component of OpenJDK 21 did not correctly
authenticate users. A remote attacker could possibly use this issue to
cause a denial of service or read or modify sensitive data.
(CVE-2026-91415)
It was discovered that the ImageIO component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to cause a denial of service. (CVE-2026-91418)
It was discovered that the Networking component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to modify sensitive data. (CVE-2026-91451, CVE-2026-91452)
It was discovered that the Lightweight HTTP Server component of OpenJDK 21
did not correctly authorize users. A remote attacker could possibly use
this issue to modify sensitive data. (CVE-2026-91453)
It was discovered that the JSSE component of OpenJDK 21 did not correctly
authorize users. A remote attacker could possibly use this issue to modify
sensitive data. (CVE-2026-91461)
It was discovered that the JGSS component of OpenJDK 21 did not correctly
authenticate users. A remote attacker could possibly use this issue to
modify sensitive data. (CVE-2026-91462)
It was discovered that the JGSS component of OpenJDK 21 did not correctly
authenticate users. A remote attacker could possibly use this issue to read
sensitive data. (CVE-2026-91463, CVE-2026-91464)
It was discovered that the Compiler component of OpenJDK 21 did not
correctly authorize users. A remote attacker could possibly use this issue
to read or modify sensitive data. (CVE-2026-91487)
It was discovered that the Libraries component of OpenJDK 21 did not
correctly authenticate users. A remote attacker could possibly use this
issue to read or modify sensitive data. (CVE-2026-101516)
It was discovered that the Security component of OpenJDK 21 did not
correctly authenticate users. A remote attacker could possibly use this
issue to read or modify sensitive data. (CVE-2026-114820)
In addition to security fixes, the updated packages contain bug fixes, new
features, and possibly incompatible changes.
Please see the following for more information:
https://openjdk.org/groups/vulnerability/advisories/2026-10-20
https://openjdk.org/groups/vulnerability/advisories/2026-10-21
https://openjdk.org/groups/vulnerability/advisories/2026-10-24
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 26.10
openjdk-21-jdk 21.0.13.0.3+1-1~26.10.1
openjdk-21-jdk-headless 21.0.13.0.3+1-1~26.10.1
openjdk-21-jre 21.0.13.0.3+1-1~26.10.1
openjdk-21-jre-headless 21.0.13.0.3+1-1~26.10.1
openjdk-21-jre-zero 21.0.13.0.3+1-1~26.10.1
openjdk-21-source 21.0.13.0.3+1-1~26.10.1
Ubuntu 26.04 LTS
openjdk-21-jdk 21.0.13.0.3+1-1~26.04.1
openjdk-21-jdk-headless 21.0.13.0.3+1-1~26.04.1
openjdk-21-jre 21.0.13.0.3+1-1~26.04.1
openjdk-21-jre-headless 21.0.13.0.3+1-1~26.04.1
openjdk-21-jre-zero 21.0.13.0.3+1-1~26.04.1
openjdk-21-source 21.0.13.0.3+1-1~26.04.1
Ubuntu 24.04 LTS
openjdk-21-jdk 21.0.13.0.3+1-1~24.04.1
openjdk-21-jdk-headless 21.0.13.0.3+1-1~24.04.1
openjdk-21-jre 21.0.13.0.3+1-1~24.04.1
openjdk-21-jre-headless 21.0.13.0.3+1-1~24.04.1
openjdk-21-jre-zero 21.0.13.0.3+1-1~24.04.1
openjdk-21-source 21.0.13.0.3+1-1~24.04.1
Ubuntu 22.04 LTS
openjdk-21-jdk 21.0.13.0.3+1-1~22.04.1
openjdk-21-jdk-headless 21.0.13.0.3+1-1~22.04.1
openjdk-21-jre 21.0.13.0.3+1-1~22.04.1
openjdk-21-jre-headless 21.0.13.0.3+1-1~22.04.1
openjdk-21-jre-zero 21.0.13.0.3+1-1~22.04.1
openjdk-21-source 21.0.13.0.3+1-1~22.04.1
Ubuntu 20.04 LTS
openjdk-21-jdk 21.0.13.0.3+1-1~20.04.1
Available with Ubuntu Pro
openjdk-21-jdk-headless 21.0.13.0.3+1-1~20.04.1
Available with Ubuntu Pro
openjdk-21-jre 21.0.13.0.3+1-1~20.04.1
Available with Ubuntu Pro
openjdk-21-jre-headless 21.0.13.0.3+1-1~20.04.1
Available with Ubuntu Pro
openjdk-21-jre-zero 21.0.13.0.3+1-1~20.04.1
Available with Ubuntu Pro
openjdk-21-source 21.0.13.0.3+1-1~20.04.1
Available with Ubuntu Pro
This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any running Java
applications to make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-9015-1
CVE-2026-101516, CVE-2026-114820, CVE-2026-83374, CVE-2026-83376,
CVE-2026-83378, CVE-2026-83380, CVE-2026-83381, CVE-2026-83387,
CVE-2026-83395, CVE-2026-83400, CVE-2026-87290, CVE-2026-87291,
CVE-2026-87292, CVE-2026-87294, CVE-2026-87367, CVE-2026-91332,
CVE-2026-91333, CVE-2026-91334, CVE-2026-91335, CVE-2026-91373,
CVE-2026-91374, CVE-2026-91375, CVE-2026-91379, CVE-2026-91380,
CVE-2026-91394, CVE-2026-91397, CVE-2026-91398, CVE-2026-91400,
CVE-2026-91403, CVE-2026-91410, CVE-2026-91415, CVE-2026-91418,
CVE-2026-91451, CVE-2026-91452, CVE-2026-91453, CVE-2026-91461,
CVE-2026-91462, CVE-2026-91463, CVE-2026-91464, CVE-2026-91487
Package Information:
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.13.0.3+1-1~26.10.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.13.0.3+1-1~26.04.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.13.0.3+1-1~24.04.1
https://launchpad.net/ubuntu/+source/openjdk-21/21.0.13.0.3+1-1~22.04.1
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