Ubuntu USN · USN-8328-1

OpenJDK 21 vulnerabilities

Published: Thu, 28 May 2026 06:22

CVE-2026-22021CVE-2026-34282CVE-2026-22013CVE-2026-22007CVE-2026-22016CVE-2026-23865CVE-2026-22018CVE-2026-34268

Summary

Several security issues were fixed in OpenJDK 21.

Details

Thomas Beckers discovered that the JAXP component of OpenJDK 21 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to gain unauthorized access to sensitive information. (CVE-2026-22016) It was discovered that the Networking component of OpenJDK 21 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-34282) It was discovered that the JSSE component of OpenJDK 21 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-22021) It was discovered that the JGSS component of OpenJDK 21 did not correctly authenticate certain APIs. A remote attacker could possibly use this issue to obtain sensitive information. (CVE-2026-22013) It was discovered that the 2D component of OpenJDK 21 did not correctly handle certain integer arithmetic. If a user or automated system were tricked into opening a specially crafted file, an attacker could possibly use this issue to leak sensitive information. (CVE-2026-23865) It was discovered that the Libraries component of OpenJDK 21 did not correctly authenticate certain APIs. A remote unauthenticated attacker could possibly use this issue to cause a denial of service. (CVE-2026-22018) Ken Pyle discovered that the Security component of OpenJDK 21 did not correctly authenticate certain APIs. A local attacker could possibly use this issue to leak sensitive information. (CVE-2026-22007, CVE-2026-34268) 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/2026-04-21

Recommended actions per Ubuntu release

StackPatch playbook auto-generated per release codename and per affected package.

Ubuntu focal

openjdk-21→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-demo→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-demo
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-doc→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk-headless→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-headless→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-zero→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-zero
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-source→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-source
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-testsupport→21.0.11+10-1~20.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~20.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-testsupport
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu jammy

openjdk-21→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-demo→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-demo
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-doc→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk-headless→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-headless→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-zero→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-zero
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-source→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-source
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-testsupport→21.0.11+10-1~22.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~22.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-testsupport
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu noble

openjdk-21→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-demo→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-demo
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-doc→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk-headless→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-headless→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-zero→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-zero
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-source→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-source
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-testsupport→21.0.11+10-1~24.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~24.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-testsupport
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu questing

openjdk-21→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-demo→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-demo
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-doc→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk-headless→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-headless→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-zero→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-zero
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-source→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-source
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-testsupport→21.0.11+10-1~25.10.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~25.10.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-testsupport
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

Ubuntu resolute

openjdk-21→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-demo→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-demo
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-doc→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-doc
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jdk-headless→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jdk-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-headless→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-headless
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-jre-zero→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-jre-zero
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-source→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-source
```
Most apt upgrades restart their service automatically. needrestart lists anything else.
openjdk-21-testsupport→21.0.11+10-1~26.04.2apt_upgrade
Standard apt upgrade. Install 21.0.11+10-1~26.04.2 from the apt repo.
```
sudo apt-get update
sudo apt-get install --only-upgrade -y openjdk-21-testsupport
```
Most apt upgrades restart their service automatically. needrestart lists anything else.

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