CVE-2026-89329: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-gm43-73c3-chhw
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CVSS 6.2
CWE-1322
Published
Advisory Summary

CVE-2026-89329 is a MODERATE (CVSS 6.2) security vulnerability vulnerability (CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses a non-blocking model that relies on a single threaded process for features such as scalability, but it contains code that can block when it is invoked.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89329 at a Glance

CVE Identifier CVE-2026-89329
GHSA Identifier GHSA-gm43-73c3-chhw
Severity MODERATE
CVSS v3.1 Base Score 6.2
CWE Classification CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 6.2

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-89329

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-89329, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context, where the product uses a non-blocking model that relies on a single threaded process for features such as scalability, but it contains code that can block when it is invoked. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

A flaw was found in `multipathd`. A local attacker with access to the `multipathd` UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the `multipathd` listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.

References

NVD — CVE-2026-89329 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89329
Software Security Information SECURITY
https://access.redhat.com/security/cve/CVE-2026-89329
bugzilla.redhat.com/show_bug.cgi WEB
https://bugzilla.redhat.com/show_bug.cgi?id=2470013

Frequently Asked Questions

What is CVE-2026-89329?
CVE-2026-89329 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-89329?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89329?
CVE-2026-89329 has a CVSS v3.1 base score of 6.2 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-89329?
CVE-2026-89329 is classified under CWE-1322: Use of Blocking Code in Single-threaded, Non-blocking Context (The product uses a non-blocking model that relies on a single threaded process for features such as scalability, but it contains code that can block when it is invoked.).
How can I check Maven dependencies for CVE-2026-89329?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-gm43-73c3-chhw",
  "modified" : "2026-09-11T21:31:18Z",
  "published" : "2026-09-11T21:31:18Z",
  "aliases" : [ "CVE-2026-89329" ],
  "details" : "A flaw was found in `multipathd`. A local attacker with access to the `multipathd` UNIX control socket can exploit this vulnerability by sending valid commands and then ceasing to read replies. This action can cause the `multipathd` listener thread to block, leading to a Denial of Service (DoS) where legitimate Inter-Process Communication (IPC) operations may hang or time out. This issue does not result in privilege escalation, arbitrary code execution, or impact data confidentiality or integrity.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89329"
  }, {
    "type" : "WEB",
    "url" : "https://access.redhat.com/security/cve/CVE-2026-89329"
  }, {
    "type" : "WEB",
    "url" : "https://bugzilla.redhat.com/show_bug.cgi?id=2470013"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1322" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T19:17:47Z"
  }
}