CVE-2026-72256: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-hh4g-5q85-w496
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Advisory Summary

CVE-2026-72256 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-72256 at a Glance

CVE Identifier CVE-2026-72256
GHSA Identifier GHSA-hh4g-5q85-w496
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-72256

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-2026-72256, 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: netfilter: xt_cluster: reject template conntracks in hash match xt_cluster_mt() treats any non-NULL nf_ct_get() result as a fully initialized conntrack and passes it to xt_cluster_hash(). This causes a state confusion bug when the raw table CT target attaches a template conntrack to skb->_nfct before normal conntrack processing. Templates carry IPS_TEMPLATE status but do not have a valid tuple for hashing yet, so xt_cluster_hash() can hit its WARN_ON() path on the zeroed l3num field. Reject template conntracks before hashing them. This matches existing netfilter handling for template objects and avoids hashing incomplete conntrack state.

References

NVD — CVE-2026-72256 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-72256
git.kernel.org/stable/c/07f9ddbf5e... WEB
https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5
git.kernel.org/stable/c/13ea4f86cf... WEB
https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62
git.kernel.org/stable/c/4558bd7b47... WEB
https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d
git.kernel.org/stable/c/4cb8b5f586... WEB
https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e
git.kernel.org/stable/c/5b2d4f0010... WEB
https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa
git.kernel.org/stable/c/5feba91006... WEB
https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e
git.kernel.org/stable/c/d5f9d050b0... WEB
https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc
git.kernel.org/stable/c/fac2fdac3b... WEB
https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54

Frequently Asked Questions

What is CVE-2026-72256?
CVE-2026-72256 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-2026-72256?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-72256?
CVE-2026-72256 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-72256?
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-hh4g-5q85-w496",
  "modified" : "2026-08-15T06:32:17Z",
  "published" : "2026-08-15T06:32:17Z",
  "aliases" : [ "CVE-2026-72256" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: xt_cluster: reject template conntracks in hash match\n\nxt_cluster_mt() treats any non-NULL nf_ct_get() result as a fully\ninitialized conntrack and passes it to xt_cluster_hash().\n\nThis causes a state confusion bug when the raw table CT target attaches\na template conntrack to skb->_nfct before normal conntrack processing.\nTemplates carry IPS_TEMPLATE status but do not have a valid tuple for\nhashing yet, so xt_cluster_hash() can hit its WARN_ON() path on the\nzeroed l3num field.\n\nReject template conntracks before hashing them. This matches existing\nnetfilter handling for template objects and avoids hashing incomplete\nconntrack state.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-72256"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/07f9ddbf5e799c24a3a52ec9bd7b729a6f6d69d5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/13ea4f86cf738c74be2146886ac261988a631e62"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4558bd7b47c7be82dffd837f27be8ea3ecee557d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4cb8b5f586e41c187942291cc0938006077fa79e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5b2d4f0010018a7aa3495aa1dbf1b7a34011e7aa"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5feba91006ec92da57acc1cc2e34df623b98541e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d5f9d050b0b267227c1f02f11021872c7768a9cc"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fac2fdac3baad9ffd12b3b0bba4374d4b3585d54"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-08-15T06:21:53Z"
  }
}