HighCVE-2026-34282

    Oracle Java SE: Infinite Loop (CVE-2026-34282)

    Published Last modified Sources: Red Hat, Debian LTS, Oracle CPU, Ubuntu, Debian, CVE.org, OSV, BSI

    What is affected, what to do

    Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17.

    The available sources name no fixed version. Check the vendor guidance in the references below.

    Affected
    • Oracle Java SE eq 8u481-perf..8u481-perf
    • Oracle Java SE eq 11.0.30..11.0.30
    • Oracle Java SE eq 17.0.18..17.0.18
    • Oracle Java SE eq 21.0.10..21.0.10
    • Oracle Java SE eq 25.0.2..25.0.2
    • Oracle Java SE eq 26..26
    • Oracle GraalVM for JDK eq 17.0.18..17.0.18
    • Oracle GraalVM for JDK eq 21.0.10..21.0.10
    • Oracle GraalVM Enterprise Edition eq 21.3.17..21.3.17

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    Metrics

    7.5

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: NVD, CVSS v3

    7.5

    CVSS v3

    Severity High on the scale from 0 to 10.

    Source: Red Hat, Debian LTS, Oracle CPU, Ubuntu, Debian, CVE.org, OSV, BSI

    0.6 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 50.3

    Show all metrics
    Severity
    High
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    74.24 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    7.5 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    7.5
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.6 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    50.3
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 22 April 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-400, CWE-835

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    High technical severity: assess and remediate the vulnerability in vulnerability handling under Art. 21(2)(e) NIS2 and document the decision.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Networking). Supported versions that are affected are Oracle Java SE: 8u481-perf, 11.0.30, 17.0.18, 21.0.10, 25.0.2, 26; Oracle GraalVM for JDK: 17.0.18 and 21.0.10; Oracle GraalVM Enterprise Edition: 21.3.17. 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 can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also 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. 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).

    Source: redhat_csaf, Debian LTS Advisories, oracle_cpu, Ubuntu Security Notices, Debian Security Advisories, NVD (NIST), cvelistv5, OSV (Open Source Vulnerabilities), CVE.org (MITRE), BSI WID Portal, BSI CSAF

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    Oracle CorporationOracle GraalVM Enterprise Edition
    • 21.3.17
    • —
    Oracle CorporationOracle GraalVM for JDK
    • 21.0.10
    • 17.0.18
    • —
    • —
    Oracle CorporationOracle Java SE
    • 26
    • 25.0.2
    • 21.0.10
    • 11.0.30
    • 17.0.18
    • 8u481-perf
    • —
    • —
    • —
    • —
    • —
    • —
    oraclegraalvm
    • 21.3.17
    • —
    oraclegraalvm_for_jdk
    • 21.0.10
    • 17.0.18
    • —
    • —
    oraclejdk
    • 21.0.10
    • 26
    • 11.0.30
    • 25.0.2
    • 17.0.18
    • 1.8.0
    • —
    • —
    • —
    • —
    • —
    • —
    oraclejre
    • 25.0.2
    • 26
    • 21.0.10
    • 17.0.18
    • 11.0.30
    • 1.8.0
    • —
    • —
    • —
    • —
    • —
    • —
    IBMLicense Metric Tool
    • 9.2
    • —

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianopenjdk-11bullseye
    Linuxdebianopenjdk-17bookworm
    Linuxdebianopenjdk-17bullseye
    Linuxdebianopenjdk-21trixie
    Linuxdebianopenjdk-25trixie

    Weakness classes (CWE)

    • CWE-400Uncontrolled Resource Consumption

      Class

      The product does not properly control the allocation and maintenance of a limited resource.

      Entry at MITRE CWE-400

    • CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')

      Base

      The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

      Entry at MITRE CWE-835

    References & sources

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedOracle

      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Referenceadded
      —
      https://www.oracle.com/security-alerts/cpuapr2026.html
      Referenceremoved
      https://www.oracle.com/security-alerts/cpuapr2026.html
      —
      Reference typeremoved
      https://www.oracle.com/security-alerts/cpuapr2026.html Types: Vendor Advisory
      —

      Source identifier: secalert_us@oracle.com

    2. Record modifiedRed Hat ADP

      Show 36 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/34xxx/CVE-2026-34282.json">CVE-2026-34282</a>
      Referenceadded
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      https://access.redhat.com/errata/RHSA-2026:11403
      Referenceadded
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      https://access.redhat.com/errata/RHSA-2026:11655
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      https://access.redhat.com/errata/RHSA-2026:11822
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      https://access.redhat.com/errata/RHSA-2026:11829
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      https://access.redhat.com/errata/RHSA-2026:11902
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      https://access.redhat.com/errata/RHSA-2026:22328
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      https://access.redhat.com/errata/RHSA-2026:9254
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      https://access.redhat.com/errata/RHSA-2026:9686
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      https://access.redhat.com/errata/RHSA-2026:9687
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      https://access.redhat.com/errata/RHSA-2026:9688
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      https://access.redhat.com/errata/RHSA-2026:9689
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      https://access.redhat.com/errata/RHSA-2026:9691
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      https://access.redhat.com/errata/RHSA-2026:9693
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      https://access.redhat.com/errata/RHSA-2026:9694
      Referenceadded
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      https://access.redhat.com/security/cve/CVE-2026-34282
      Referenceadded
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      https://bugzilla.redhat.com/show_bug.cgi?id=2460044
      Referenceadded
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      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34282.json
      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:11403
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:11655
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:11822
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:11829
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:11902
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:22328
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9254
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      https://access.redhat.com/errata/RHSA-2026:9256
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9686
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9687
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9688
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9689
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9691
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9693
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      Referenceremoved
      https://access.redhat.com/errata/RHSA-2026:9694
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      Referenceremoved
      https://access.redhat.com/security/cve/CVE-2026-34282
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      Referenceremoved
      https://bugzilla.redhat.com/show_bug.cgi?id=2460044
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      Referenceremoved
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34282.json
      —

      Source identifier: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

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