CVE-2026-64218: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-jcwg-v5j7-jrrq
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CVSS 7.8
Published
Advisory Summary

CVE-2026-64218 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64218 at a Glance

CVE Identifier CVE-2026-64218
GHSA Identifier GHSA-jcwg-v5j7-jrrq
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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:H/I:H/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 High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-64218

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-2026-64218, 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: batman-adv: bla: fix report_work leak on backbone_gw purge batadv_bla_purge_backbone_gw() removes stale backbone gateway entries, but fails to properly handle their associated report_work: - If report_work is running, the purge must wait for it to finish before freeing the backbone_gw, otherwise the worker may access freed memory (e.g. bat_priv). - If report_work is pending, the purge must cancel it and release the reference held for that pending work item. The previous implementation called hlist_for_each_entry_safe() inside a spin_lock_bh() section, but cancel_work_sync() may sleep and therefore cannot be called from within a spinlock-protected region. Restructure the loop to handle one entry per spinlock critical section: acquire the lock, find the next entry to purge, remove it from the hash list, then release the lock before calling cancel_work_sync() and dropping the hash_entry reference. Repeat until no more entries require purging.

References

NVD — CVE-2026-64218 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64218
git.kernel.org/stable/c/0459430add... WEB
https://git.kernel.org/stable/c/0459430add32ea41f3e2ef9351610e6d33627a6b
git.kernel.org/stable/c/3423a45e5c... WEB
https://git.kernel.org/stable/c/3423a45e5c3d3c5129f88143a9a969787d7d5a0a
git.kernel.org/stable/c/4866315822... WEB
https://git.kernel.org/stable/c/48663158222b3b7f6ee6791a67d512ede7fc94bb
git.kernel.org/stable/c/95a7034661... WEB
https://git.kernel.org/stable/c/95a7034661274cf5985708bd2f6d86ee46f88fa9
git.kernel.org/stable/c/c6de1a5a9c... WEB
https://git.kernel.org/stable/c/c6de1a5a9c406e30b91f1515a6ce05cc84023baa
git.kernel.org/stable/c/ce2c0ee4d7... WEB
https://git.kernel.org/stable/c/ce2c0ee4d76d5ee4b391fe0e31334361e25030ec
git.kernel.org/stable/c/eeddd7bab3... WEB
https://git.kernel.org/stable/c/eeddd7bab3d59c1e98642a204141f8c5d6194707
git.kernel.org/stable/c/f1303adb1e... WEB
https://git.kernel.org/stable/c/f1303adb1e59582f76c22798a2e2e150e054a9e7

Frequently Asked Questions

What is CVE-2026-64218?
CVE-2026-64218 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-2026-64218?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64218?
CVE-2026-64218 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-64218?
CVE-2026-64218 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64218?
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-jcwg-v5j7-jrrq",
  "modified" : "2026-07-27T06:30:30Z",
  "published" : "2026-07-24T18:31:27Z",
  "aliases" : [ "CVE-2026-64218" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: bla: fix report_work leak on backbone_gw purge\n\nbatadv_bla_purge_backbone_gw() removes stale backbone gateway entries,\nbut fails to properly handle their associated report_work:\n\n- If report_work is running, the purge must wait for it to finish before\n  freeing the backbone_gw, otherwise the worker may access freed memory\n  (e.g. bat_priv).\n- If report_work is pending, the purge must cancel it and release the\n  reference held for that pending work item.\n\nThe previous implementation called hlist_for_each_entry_safe() inside a\nspin_lock_bh() section, but cancel_work_sync() may sleep and therefore\ncannot be called from within a spinlock-protected region.\n\nRestructure the loop to handle one entry per spinlock critical section:\nacquire the lock, find the next entry to purge, remove it from the hash\nlist, then release the lock before calling cancel_work_sync() and\ndropping the hash_entry reference. Repeat until no more entries require\npurging.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64218"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0459430add32ea41f3e2ef9351610e6d33627a6b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3423a45e5c3d3c5129f88143a9a969787d7d5a0a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/48663158222b3b7f6ee6791a67d512ede7fc94bb"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/95a7034661274cf5985708bd2f6d86ee46f88fa9"
  }, {
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ce2c0ee4d76d5ee4b391fe0e31334361e25030ec"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/eeddd7bab3d59c1e98642a204141f8c5d6194707"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f1303adb1e59582f76c22798a2e2e150e054a9e7"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-24T16:16:49Z"
  }
}