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CVE Record

CVE-2022-21340: Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component...

Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: Libraries). Supported versions that are affected are Oracle Java SE: 7u321, 8u311, 11.0.13, 17.0.1; Oracle GraalVM Enterprise Edition: 20.3.4 and 21.3.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, 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 can also be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).

MediumCVSS 5.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-21340 is a medium-severity Oracle Java and GraalVM vulnerability that can let an unauthenticated network attacker cause partial denial of service. The business risk is service disruption, especially where affected Java runtimes process untrusted code or untrusted data through vulnerable library APIs.

Executive priority

Treat this as a routine but real availability risk. It does not indicate data theft or privilege escalation, and no active exploitation is cited. Prioritize patching internet-facing Java services, systems processing untrusted input, and products bundling affected Java runtimes.

Technical view

Oracle describes this as a Libraries component vulnerability affecting Java SE 7u321, 8u311, 11.0.13, 17.0.1 and GraalVM Enterprise Edition 20.3.4, 21.3.0. CVSS 3.1 is 5.3: network attack vector, low complexity, no privileges, no user interaction, availability-only partial impact. CWE-400 indicates resource consumption risk.

Likely exposure

Exposure is most likely in systems running the listed Oracle Java SE or GraalVM Enterprise Edition versions, downstream OpenJDK packages, or products bundling them. Priority increases for services accepting untrusted data into Java library APIs, and for legacy sandboxed Java Web Start or applet use.

Exploitation context

The source bundle does not show CISA KEV listing or confirmed active exploitation. Oracle states the issue is easily exploitable by unauthenticated network attackers via multiple protocols. Successful exploitation is limited to partial denial of service, not confidentiality or integrity compromise.

Researcher notes

Key constraints are the narrow impact and incomplete source detail on fixed versions. The most useful work is asset correlation: affected runtime versions, Java services receiving untrusted input, and vendor-bundled Java components. Do not assume exploit activity without external confirmation.

Mitigation direction

  • Apply vendor security updates from Oracle or the relevant OS/product vendor.
  • Inventory Java SE, OpenJDK, and GraalVM versions across servers and endpoints.
  • Avoid running untrusted sandboxed Java code until affected runtimes are updated.
  • Review services that pass untrusted input into Java library APIs.
  • Check embedded Java runtimes in appliances or third-party products.

Validation and detection

  • Confirm runtime versions are not the affected releases listed by Oracle.
  • Check package manager status for Debian, Gentoo, and other downstream updates.
  • Review application logs for unexplained Java process resource exhaustion or partial outages.
  • Identify internet-facing Java services that parse or process untrusted input.
  • Confirm vendors for Java-bundling products have addressed CVE-2022-21340.
Prepared
Confidence
high
Sources
8

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-400: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2022-21340 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.3 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
2ADP providers
7Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.3CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L3.91.4oracle

Vulnerability scoring details

Base CVSS 3.1 score

5.3Medium
CVSS 3.1 vector shape for CVE-2022-21340Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Oracle CorporationJava SE JDK and JREOracle Java SE:7u321, Oracle Java SE:8u311, Oracle Java SE:11.0.13, Oracle Java SE:17.0.1, Oracle GraalVM Enterprise Edition:20.3.4, Oracle GraalVM Enterprise Edition:21.3.0Listed
Weakness

CWE details

CWE-400

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.