CVE-2026-64211: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-9gr3-vwh2-w2vv
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CVSS 5.5
Published
Advisory Summary

CVE-2026-64211 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64211 at a Glance

CVE Identifier CVE-2026-64211
GHSA Identifier GHSA-9gr3-vwh2-w2vv
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-64211

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-2026-64211, 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 General Security Weakness. 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

In the Linux kernel, the following vulnerability has been resolved: srcu: Don't queue workqueue handlers to never-online CPUs While an srcu_struct structure is in the midst of switching from CPU-0 to all-CPUs state, it can attempt to invoke callbacks for CPUs that have never been online. Worse yet, it can attempt in invoke callbacks for CPUs that never will be online, even including imaginary CPUs not in cpu_possible_mask. This can cause hangs on s390, which is not set up to deal with workqueue handlers being scheduled on such CPUs. This commit therefore causes Tree SRCU to refrain from queueing workqueue handlers on CPUs that have not yet (and might never) come online. Because callbacks are not invoked on CPUs that have not been online, it is an error to invoke call_srcu(), synchronize_srcu(), or synchronize_srcu_expedited() on a CPU that is not yet fully online. However, it turns out to be less code to redirect the callbacks from too-early invocations of call_srcu() than to warn about such invocations. This commit therefore also redirects callbacks queued on not-yet-fully-online CPUs to the boot CPU.

References

NVD — CVE-2026-64211 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64211
git.kernel.org/stable/c/593889c401... WEB
https://git.kernel.org/stable/c/593889c401426004bd0ea0f6d4fcece728b03420
git.kernel.org/stable/c/a4153538fc... WEB
https://git.kernel.org/stable/c/a4153538fcd2361c4e0039eb103265492d26044e

Frequently Asked Questions

What is CVE-2026-64211?
CVE-2026-64211 is a security vulnerability in Software classified as a security vulnerability vulnerability under General Security Weakness.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64211?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64211?
CVE-2026-64211 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-64211?
CVE-2026-64211 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64211?
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-9gr3-vwh2-w2vv",
  "modified" : "2026-08-11T18:30:38Z",
  "published" : "2026-07-24T18:31:26Z",
  "aliases" : [ "CVE-2026-64211" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsrcu: Don't queue workqueue handlers to never-online CPUs\n\nWhile an srcu_struct structure is in the midst of switching from CPU-0\nto all-CPUs state, it can attempt to invoke callbacks for CPUs that\nhave never been online.  Worse yet, it can attempt in invoke callbacks\nfor CPUs that never will be online, even including imaginary CPUs not in\ncpu_possible_mask.  This can cause hangs on s390, which is not set up to\ndeal with workqueue handlers being scheduled on such CPUs.  This commit\ntherefore causes Tree SRCU to refrain from queueing workqueue handlers\non CPUs that have not yet (and might never) come online.\n\nBecause callbacks are not invoked on CPUs that have not been\nonline, it is an error to invoke call_srcu(), synchronize_srcu(), or\nsynchronize_srcu_expedited() on a CPU that is not yet fully online.\nHowever, it turns out to be less code to redirect the callbacks\nfrom too-early invocations of call_srcu() than to warn about such\ninvocations.  This commit therefore also redirects callbacks queued on\nnot-yet-fully-online CPUs to the boot CPU.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64211"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/593889c401426004bd0ea0f6d4fcece728b03420"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a4153538fcd2361c4e0039eb103265492d26044e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-24T16:16:48Z"
  }
}