> CVE-2026-21945 [HIGH]

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PUBLISHED
2026-01-20 22:15
MODIFIED
2026-01-20 22:15
CVSS_SCORE V3
7.5
EPSS (Prob. Exploit)
0.99%
Top 37.7%
DATA SOURCES:
NVD 🔗 2026-01-20 RED HAT 🔗 2026-01-25 FIRST EPSS 🔗 2026-10-25 OSV 🔗 2026-03-01

> 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).

> AFFECTED_PRODUCTS

Red Hat - Red Hat Enterprise Linux 10
Version: 21
Red Hat - Red Hat Enterprise Linux 8
Version: 17
Red Hat - Red Hat Enterprise Linux 8
Version: 21
Red Hat - Red Hat Enterprise Linux 9
Version: 17
Red Hat - Red Hat Enterprise Linux 9
Version: 21
Red Hat - Red Hat Enterprise Linux 9.4 Extended Update Support
Version: 17
Red Hat - Red Hat Enterprise Linux 9.4 Extended Update Support
Version: 21
Red Hat - Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
Version: 17
Red Hat - Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
Version: 17
Red Hat - Red Hat Enterprise Linux 8.6 Telecommunications Update Service
Version: 17
Red Hat - Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
Version: 17
Red Hat - Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On
Version: 17
Red Hat - Red Hat Enterprise Linux 8.8 Telecommunications Update Service
Version: 17
Red Hat - Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
Version: 17
Red Hat - Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions
Version: 17
Red Hat - Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions
Version: 17
Red Hat - Red Hat OpenJDK 11 els for RHEL 7
Version: 11
Red Hat - Red Hat OpenJDK 11 els for RHEL 8
Version: 11
Red Hat - Red Hat OpenJDK 11 els for RHEL 9
Version: 11
Red Hat - Red Hat Enterprise Linux 10.0 Extended Update Support
Version: 21
Red Hat - Red Hat Enterprise Linux 9.6 Extended Update Support
Version: 17
Red Hat - Red Hat Enterprise Linux 9.6 Extended Update Support
Version: 21
Red Hat - OPENJDK ELS 11.0.30
Version: 11

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EXPLOITABILITY
3.9
IMPACT
3.6

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
None (N)
Aucune divulgation d'informations
I (Impact Intégrité)
Integrity Impact
None (N)
Aucune modification de données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
None
Aucune divulgation d'informations
Intégrité
None
Aucune modification de données possible
Disponibilité
High
Interruption totale du service possible

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: java-11-openjdk ELS security update
An update for java-11-openjdk with Extended Lifecycle Support is now available for Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, and Red Hat Enterprise Linux 9.
Red Hat Security Advisory: OpenJDK 11.0.30 ELS Security Update for Windows Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 11.0.30 ELS Security Update for Portable Linux Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: java-17-openjdk security update
An update for java-17-openjdk is now available for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterp...
Red Hat Security Advisory: java-21-openjdk security update
An update for java-21-openjdk is now available for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9.4 Extended Update Support, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enter...
Red Hat Security Advisory: java-1.8.0-openjdk security update
An update for java-1.8.0-openjdk is now available for Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.8 Extended Update Support, Red Hat Enterprise Linux 8.2 Advanced Update Support, Red Hat En...
Red Hat Security Advisory: java-1.8.0-openjdk security update
An update for java-1.8.0-openjdk is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support. Red Hat Product Security has rated this update as having a security impact of Important. A...
Red Hat Security Advisory: OpenJDK 25.0.2 Security Update for Portable Linux Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 21.0.10 Security Update for Windows Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 21.0.10 Security Update for Portable Linux Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 17.0.18 Security Update for Windows Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 17.0.18 Security Update for Portable Linux Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 8u482 Security Update for Portable Linux Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: OpenJDK 8u482 Windows Security Update
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: java-25-openjdk security update
An update for java-25-openjdk is now available for Red Hat Enterprise Linux 9 and Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important....
Red Hat Security Advisory: OpenJDK 25.0.2 Security Update for Windows Builds
An update is now available for OpenJDK. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a...
Red Hat Security Advisory: java-1.8.0-ibm security update
An update for java-1.8.0-ibm is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring S...

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> OSV (GOOGLE OPEN SOURCE VULNERABILITIES)

AFFECTED PACKAGES:
Unknown / Unknown
62 versions affected

> HISTORIQUE DES MODIFICATIONS

Première apparition
20/01/2026 22:15
Source: NVD
📊 ENRICHISSEMENT 25/01/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 25/01/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 2 Dernière mise à jour: 9 months ago

> REFERENCES

https://www.oracle.com/security-alerts/cpujan2026.html
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