CVE-2025-21765: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-cfq6-3hq6-2p95
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CVSS 5.5
Published
Advisory Summary

CVE-2025-21765 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-2025-21765 at a Glance

CVE Identifier CVE-2025-21765
GHSA Identifier GHSA-cfq6-3hq6-2p95
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-2025-21765

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-2025-21765, 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: ipv6: use RCU protection in ip6_default_advmss() ip6_default_advmss() needs rcu protection to make sure the net structure it reads does not disappear.

References

NVD — CVE-2025-21765 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21765
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-019113.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-082556.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-265688.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-457936.html
cert-portal.siemens.com/productcert/html/ss... WEB
https://cert-portal.siemens.com/productcert/html/ssa-784472.html
git.kernel.org/stable/c/28de355b63... WEB
https://git.kernel.org/stable/c/28de355b63ad42309ed5a03ee7c436c90512265b
git.kernel.org/stable/c/3c8ffcd248... WEB
https://git.kernel.org/stable/c/3c8ffcd248da34fc41e52a46e51505900115fc2a
git.kernel.org/stable/c/4176a68b0d... WEB
https://git.kernel.org/stable/c/4176a68b0db8fc74ac14fcd00ba8231371051dc2
git.kernel.org/stable/c/550ed693f4... WEB
https://git.kernel.org/stable/c/550ed693f47370502a71b85382e7f9e6417300b8
git.kernel.org/stable/c/713a40c892... WEB
https://git.kernel.org/stable/c/713a40c892f40300d63691d9f85b2a23b48fe1e8
git.kernel.org/stable/c/78ad057472... WEB
https://git.kernel.org/stable/c/78ad057472d8c76e0602402269222f9f9c698790
git.kernel.org/stable/c/84212387ca... WEB
https://git.kernel.org/stable/c/84212387caadb211cd9dadd6fd5563bd37dc1f5e
git.kernel.org/stable/c/d02f30d220... WEB
https://git.kernel.org/stable/c/d02f30d220ef9511568a48dba8a9004c65f8d904
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
lists.debian.org/debian-lts-announce... WEB
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html

Frequently Asked Questions

What is CVE-2025-21765?
CVE-2025-21765 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-2025-21765?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2025-21765?
CVE-2025-21765 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-2025-21765?
CVE-2025-21765 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2025-21765?
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 
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  "id" : "GHSA-cfq6-3hq6-2p95",
  "modified" : "2026-10-15T03:34:36Z",
  "published" : "2025-02-27T03:34:05Z",
  "aliases" : [ "CVE-2025-21765" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: use RCU protection in ip6_default_advmss()\n\nip6_default_advmss() needs rcu protection to make\nsure the net structure it reads does not disappear.",
  "severity" : [ {
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  } ],
  "database_specific" : {
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    "github_reviewed_at" : null,
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}