CVE-2026-21945 (GCVE-0-2026-21945)
Vulnerability from cvelistv5 – Published: 2026-01-20 21:56 – Updated: 2026-07-31 12:04
VLAI
EPSS
VEX
Summary
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).
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-21 15:04 UTC
CWE
- 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 - Uncontrolled Resource Consumption
- CWE-295 - Improper Certificate Validation
Assigner
References
18 references
Impacted products
53 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Oracle Corporation | Oracle Java SE |
Affected:
8u471
Affected: 8u471-b50 Affected: 8u471-perf Affected: 11.0.29 Affected: 17.0.17 Affected: 21.0.9 Affected: 25.0.1 |
guessed | |
| Oracle Corporation | Oracle GraalVM for JDK |
Affected:
17.0.17
Affected: 21.0.9 |
guessed | |
| Oracle Corporation | Oracle GraalVM Enterprise Edition |
Affected:
21.3.16
|
guessed | |
| Siemens | SIMATIC CN 4100 |
Affected:
0 , < V5.0
(custom)
|
guessed | |
| Red Hat | OPENJDK ELS 11.0.30 |
Unaffected:
openjdk-portable , < *
(rpm)
Unaffected: openjdk-windows , < * (rpm) cpe:/a:redhat:openjdk_els:11 |
||
| Red Hat | Red Hat Build of OpenJDK 17.0.18 |
Unaffected:
openjdk-portable , < *
(rpm)
Unaffected: openjdk-windows , < * (rpm) cpe:/a:redhat:openjdk:17 |
||
| Red Hat | Red Hat Build of OpenJDK 21.0.10 |
Unaffected:
openjdk-portable , < *
(rpm)
Unaffected: openjdk-windows , < * (rpm) cpe:/a:redhat:openjdk:21 |
||
| Red Hat | Red Hat Build of OpenJDK 25.0.2 |
Unaffected:
openjdk-portable , < *
(rpm)
cpe:/a:redhat:openjdk:25 |
||
| Red Hat | Red Hat Build of OpenJDK 8u482 |
Unaffected:
openjdk-portable , < *
(rpm)
Unaffected: openjdk-windows , < * (rpm) cpe:/a:redhat:openjdk:1.8 |
||
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:21.0.10.0.7-1.el10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
||
| Red Hat | Red Hat Enterprise Linux 10 |
Unaffected:
1:25.0.2.0.10-1.el10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux:10.1 |
||
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support |
Unaffected:
1:21.0.10.0.7-1.el10 , < *
(rpm)
cpe:/o:redhat:enterprise_linux_eus:10.0 |
||
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support |
Unaffected:
1:1.8.0.482.b08-1.el7_9 , < *
(rpm)
cpe:/o:redhat:rhel_els:7 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
1:21.0.10.0.7-1.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8 |
||
| Red Hat | Red Hat Enterprise Linux 8 |
Unaffected:
1:1.8.0.8.60-1.el8_10 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:8::supplementary |
||
| Red Hat | Red Hat Enterprise Linux 8.2 Advanced Update Support |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.2 |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4 |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.4 |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.4 |
||
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_eus_long_life:8.4 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_aus:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Telecommunications Update Service |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.6 |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_tus:8.8 |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
1:17.0.18.0.8-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
||
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions |
Unaffected:
1:1.8.0.482.b08-1.el8 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:8.8 |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
1:17.0.18.0.8-1.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
1:21.0.10.0.7-1.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
1:1.8.0.482.b08-1.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
||
| Red Hat | Red Hat Enterprise Linux 9 |
Unaffected:
1:25.0.2.0.10-1.el9 , < *
(rpm)
cpe:/a:redhat:enterprise_linux:9 |
||
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions |
Unaffected:
1:17.0.18.0.8-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.0 |
||
| Red Hat | Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions |
Unaffected:
1:1.8.0.482.b08-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.0 |
||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
1:17.0.18.0.8-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
||
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions |
Unaffected:
1:1.8.0.482.b08-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_e4s:9.2 |
||
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support |
Unaffected:
1:17.0.18.0.8-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.4 |
||
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support |
Unaffected:
1:21.0.10.0.7-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.4 |
||
| Red Hat | Red Hat Enterprise Linux 9.4 Extended Update Support |
Unaffected:
1:1.8.0.482.b08-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.4 |
||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
1:17.0.18.0.8-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
1:21.0.10.0.7-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
||
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support |
Unaffected:
1:1.8.0.482.b08-1.el9 , < *
(rpm)
cpe:/a:redhat:rhel_eus:9.6 |
||
| Red Hat | Red Hat OpenJDK 11 els for RHEL 7 |
Unaffected:
1:11.0.30.0.7-1.el7_9 , < *
(rpm)
cpe:/a:redhat:openjdk_els:11::el7 |
||
| Red Hat | Red Hat OpenJDK 11 els for RHEL 8 |
Unaffected:
1:11.0.30.0.7-1.el8 , < *
(rpm)
cpe:/a:redhat:openjdk_els:11::el8 |
||
| Red Hat | Red Hat OpenJDK 11 els for RHEL 9 |
Unaffected:
1:11.0.30.0.7-1.el9 , < *
(rpm)
cpe:/a:redhat:openjdk_els:11::el9 |
||
| Red Hat | Temurin Build of OpenJDK 25.0.2 |
Unaffected:
openjdk-windows , < *
(rpm)
cpe:/a:redhat:openjdk:25 |
||
| Red Hat | Red Hat Enterprise Linux 10 |
cpe:/o:redhat:enterprise_linux:10
|
||
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6
|
||
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7
|
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"lessThan": "*",
"status": "unaffected",
"version": "1:1.8.0.482.b08-1.el8",
"versionType": "rpm"
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"value": "Vulnerabilidad en el producto Oracle Java SE, Oracle GraalVM para JDK, Oracle GraalVM Enterprise Edition de Oracle Java SE (componente: Seguridad). Las versiones compatibles afectadas son Oracle Java SE: 8u471, 8u471-b50, 8u471-perf, 11.0.29, 17.0.17, 21.0.9, 25.0.1; Oracle GraalVM para JDK: 17.0.17 y 21.0.9; Oracle GraalVM Enterprise Edition: 21.3.16. La vulnerabilidad f\u00e1cilmente explotable permite a un atacante no autenticado con acceso a la red a trav\u00e9s de m\u00faltiples protocolos comprometer Oracle Java SE, Oracle GraalVM para JDK, Oracle GraalVM Enterprise Edition. Los ataques exitosos de esta vulnerabilidad pueden resultar en la capacidad no autorizada de causar un bloqueo o una ca\u00edda (crash) frecuentemente repetible (DoS completo) de Oracle Java SE, Oracle GraalVM para JDK, Oracle GraalVM Enterprise Edition. Nota: Esta vulnerabilidad se aplica a implementaciones de Java, t\u00edpicamente en clientes que ejecutan aplicaciones Java Web Start en sandbox o applets Java en sandbox, que cargan y ejecutan c\u00f3digo no confiable (por ejemplo, c\u00f3digo que proviene de internet) y dependen del sandbox de Java para la seguridad. Esta vulnerabilidad no se aplica a implementaciones de Java, t\u00edpicamente en servidores, que cargan y ejecutan solo c\u00f3digo confiable (por ejemplo, c\u00f3digo instalado por un administrador). Puntuaci\u00f3n base CVSS 3.1 7.5 (Impactos en la disponibilidad). Vector CVSS: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)."
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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Solutions
ADP · redhat-SADP
RHSA-2026:0931: Red Hat Enterprise Linux Server (v. 7 ELS), Red Hat Enterprise Linux Server Optional (v. 7 ELS)
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
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)
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)
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)
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)
RHSA-2026:0848: OPENJDK ELS 11.0.30
RHSA-2026:0897: Red Hat Build of OpenJDK 17.0.18
RHSA-2026:0899: Red Hat Build of OpenJDK 21.0.10
RHSA-2026:0901: Red Hat Build of OpenJDK 25.0.2
RHSA-2026:0895: Red Hat Build of OpenJDK 8u482
RHSA-2026:4832: Red Hat Enterprise Linux Supplementary (v. 8)
RHSA-2026:1606: Temurin Build of OpenJDK 25.0.2
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.