CVE-2025-21764: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-j8mq-pfgm-36r2
Share
CVSS 7.8
CWE-416
Published
Advisory Summary

CVE-2025-21764 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-416: Use After Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.. Remediation is available in the latest vendor maintenance releases.

CVE-2025-21764 at a Glance

CVE Identifier CVE-2025-21764
GHSA Identifier GHSA-j8mq-pfgm-36r2
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-416: Use After Free
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-2025-21764

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-2025-21764, 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-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. 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: ndisc: use RCU protection in ndisc_alloc_skb() ndisc_alloc_skb() can be called without RTNL or RCU being held. Add RCU protection to avoid possible UAF.

References

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
NVD — CVE-2025-21764 NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-21764
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-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/3c2d705f5a... WEB
https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d
git.kernel.org/stable/c/628e6d1893... WEB
https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9
git.kernel.org/stable/c/96fc896d0e... WEB
https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879
git.kernel.org/stable/c/9e0ec817eb... WEB
https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304
git.kernel.org/stable/c/b870256dd2... WEB
https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63
git.kernel.org/stable/c/bbec88e410... WEB
https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28
git.kernel.org/stable/c/c30893ef3d... WEB
https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1
git.kernel.org/stable/c/cd1065f92e... WEB
https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926

Frequently Asked Questions

What is CVE-2025-21764?
CVE-2025-21764 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-416: Use After Free.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2025-21764?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2025-21764?
CVE-2025-21764 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-2025-21764?
CVE-2025-21764 is classified under CWE-416: Use After Free (The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.).
How can I check Maven dependencies for CVE-2025-21764?
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-j8mq-pfgm-36r2",
  "modified" : "2026-10-15T03:34:36Z",
  "published" : "2025-02-27T03:34:05Z",
  "aliases" : [ "CVE-2025-21764" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nndisc: use RCU protection in ndisc_alloc_skb()\n\nndisc_alloc_skb() can be called without RTNL or RCU being held.\n\nAdd RCU protection to avoid possible UAF.",
  "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-2025-21764"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"
  }, {
    "type" : "WEB",
    "url" : "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3c2d705f5adf5d860aaef90cb4211c0fde2ba66d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/628e6d18930bbd21f2d4562228afe27694f66da9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/96fc896d0e5b37c12808df797397fb16f3080879"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9e0ec817eb41a55327a46cd3ce331a9868d60304"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b870256dd2a5648d5ed2f22316b3ac29a7e5ed63"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bbec88e4108e8d6fb468d3817fa652140a44ff28"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c30893ef3d9cde8e7e8e4fd06b53d2c935bbccb1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cd1065f92eb7ff21b9ba5308a86f33d1670bf926"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
  }, {
    "type" : "WEB",
    "url" : "https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-416" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2025-02-27T03:15:17Z"
  }
}