CVE-2026-21945
Summary
| CVE | CVE-2026-21945 |
|---|---|
| State | PUBLISHED |
| Assigner | oracle |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-01-20 22:15:57 UTC |
| Updated | 2026-06-30 03:17:25 UTC |
| Description | Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM for JDK: 17.0.17 and 21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Note: This vulnerability 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. This vulnerability does not apply to Java deployments, typically in servers, that load and run only trusted code (e.g., code installed by an administrator). CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.008640000 probability, percentile 0.541310000 (date 2026-07-01)
Problem Types: CWE-400 | CWE-295 | Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. | CWE-400 CWE-400 Uncontrolled Resource Consumption | CWE-295 Improper Certificate Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Oracle | Graalvm | 21.3.16 | All | All | All |
| Application | Oracle | Graalvm For Jdk | 17.0.17 | All | All | All |
| Application | Oracle | Graalvm For Jdk | 21.0.9 | All | All | All |
| Application | Oracle | Jdk | 1.8.0 | update471 | All | All |
| Application | Oracle | Jdk | 1.8.0 | update471 | All | All |
| Application | Oracle | Jdk | 1.8.0 | update471_b50 | All | All |
| Application | Oracle | Jdk | 11.0.29 | All | All | All |
| Application | Oracle | Jdk | 17.0.17 | All | All | All |
| Application | Oracle | Jdk | 21.0.9 | All | All | All |
| Application | Oracle | Jdk | 25.0.1 | All | All | All |
| Application | Oracle | Jre | 1.8.0 | update471 | All | All |
| Application | Oracle | Jre | 1.8.0 | update471 | All | All |
| Application | Oracle | Jre | 1.8.0 | update471_b50 | All | All |
| Application | Oracle | Jre | 11.0.29 | All | All | All |
| Application | Oracle | Jre | 17.0.17 | All | All | All |
| Application | Oracle | Jre | 21.0.9 | All | All | All |
| Application | Oracle | Jre | 25.0.1 | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:0899 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0897 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0895 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0928 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:4832 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0848 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0931 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0933 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0901 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| www.oracle.com/security-alerts/cpujan2026.html | [email protected] | www.oracle.com | Vendor Advisory |
| cert-portal.siemens.com/productcert/html/ssa-032379.html | 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e | cert-portal.siemens.com | |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0847 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0932 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:1606 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-21945.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-21945 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:0927 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-01-15T12:05:58.026Z | Reported to Red Hat. |
| ADP | 2026-01-20T21:21:00.000Z | Made public. |
Solutions
ADP: RHSA-2026:0931: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)
ADP: RHSA-2026:0847: Red Hat OpenJDK 11 ELS for RHEL 7, Red Hat OpenJDK 11 ELS for RHEL 8, Red Hat OpenJDK 11 ELS for RHEL 9
ADP: RHSA-2026:0928: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux AppStream EUS (v. 10.0), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux CRB (v. 8), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)
ADP: RHSA-2026:0933: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 10), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
ADP: RHSA-2026:0932: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux AppStream AUS (v. 8.2), Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux AppStream TUS (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.8), Red Hat Enterprise Linux CRB (v. 8), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
ADP: RHSA-2026:0927: Red Hat CodeReady Linux Builder EUS (v.9.4), Red Hat CodeReady Linux Builder EUS (v.9.6), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux AppStream AUS (v.8.4), Red Hat Enterprise Linux AppStream AUS (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.6), Red Hat Enterprise Linux AppStream E4S (v.8.8), Red Hat Enterprise Linux AppStream E4S (v.9.0), Red Hat Enterprise Linux AppStream E4S (v.9.2), Red Hat Enterprise Linux AppStream EUS (v.9.4), Red Hat Enterprise Linux AppStream EUS (v.9.6), Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4), Red Hat Enterprise Linux AppStream TUS (v.8.6), Red Hat Enterprise Linux AppStream TUS (v.8.8), Red Hat Enterprise Linux CRB (v. 8), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)
ADP: RHSA-2026:0848: OPENJDK ELS 11.0.30
ADP: RHSA-2026:0897: Red Hat Build of OpenJDK 17.0.18
ADP: RHSA-2026:0899: Red Hat Build of OpenJDK 21.0.10
ADP: RHSA-2026:0901: Red Hat Build of OpenJDK 25.0.2
ADP: RHSA-2026:0895: Red Hat Build of OpenJDK 8u482
ADP: RHSA-2026:4832: Red Hat Enterprise Linux Supplementary (v. 8)
ADP: RHSA-2026:1606: Temurin Build of OpenJDK 25.0.2