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  4. CVE 2023 5685 xnio stackoverflowexception when the chain of
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Back to active CVEs
High · CVSS 7.5CVE-2023-5685

Xnio: stackoverflowexception when the chain of notifier states becomes problematically bigCVE-2023-5685

Answer in brief

CVE-2023-5685 records a High severity (CVSS 7.5) vulnerability in Xnio: stackoverflowexception when the chain of notifier states becomes problematically big. The current sources do not mark it as known exploited. The current feed maps Red Hat/xnio (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Mar 22, 2024Updated Sep 14, 2026Source checked Oct 29, 2026First seen by HOL Sep 14, 2026Material review Sep 14, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-400
Source
CVE List V5
Source checked
Oct 29, 2026
References
9 linked sources
Open source record

Key facts

Risk
High · CVSS 7.5
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/xnio (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/xniogeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/xnio.
  2. 2Review the reported fix. Source-reported workaround: There is currently no mitigation available for this vulnerability. Please keep the packages up-to-date as the updates become available.

Evidence timeline and material changes

  1. Published upstream

    Mar 22, 2024

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 14, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 14, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

A flaw was found in XNIO. The XNIO NotifierState that can cause a Stack Overflow Exception when the chain of notifier states becomes problematically large can lead to uncontrolled resource management and a possible denial of service (DoS).

Quoted source text, attributed separately from HOL analysis.

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