CVE-2026-6924: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-wm5h-r2qh-r97h
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CWE-336
Published
Advisory Summary

CVE-2026-6924 is a HIGH security vulnerability vulnerability (CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG)) affecting Software libraries in the Maven ecosystem. The weakness occurs when a pseudo-random number generator (prng) uses the same seed each time the product is initialized.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-6924 at a Glance

CVE Identifier CVE-2026-6924
GHSA Identifier GHSA-wm5h-r2qh-r97h
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG)
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-6924

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-2026-6924, 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-336: Same Seed in Pseudo-Random Number Generator (PRNG), where a pseudo-random number generator (prng) uses the same seed each time the product is initialized. 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

A bug in the entropy initialization for SiWx917 causes the DRBG to use a predictable seed. As such, all random numbers generated in the Matter code use the same stream of numbers. This vulnerability was discovered after the impacted repository was already deprecated.

References

NVD — CVE-2026-6924 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-6924
Software Source Repository REPOSITORY
https://github.com/SiliconLabs/matter/tree/release_2.3.1-1.3
siliconlabs.lightning.force.com/sfc/servlet.shepher... WEB
https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm0000009SzZIAU?operationContext=S1

Frequently Asked Questions

What is CVE-2026-6924?
CVE-2026-6924 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG).
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-6924?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-6924?
CVE-2026-6924 is classified under CWE-336: Same Seed in Pseudo-Random Number Generator (PRNG) (A Pseudo-Random Number Generator (PRNG) uses the same seed each time the product is initialized.).
How can I check Maven dependencies for CVE-2026-6924?
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-wm5h-r2qh-r97h",
  "modified" : "2026-07-23T21:31:03Z",
  "published" : "2026-07-23T21:31:03Z",
  "aliases" : [ "CVE-2026-6924" ],
  "details" : "A bug in the entropy initialization for SiWx917 causes the DRBG to use a predictable seed. As such, all random numbers generated in the Matter code use the same stream of numbers. This vulnerability was discovered after the impacted repository was already deprecated.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-6924"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/SiliconLabs/matter/tree/release_2.3.1-1.3"
  }, {
    "type" : "WEB",
    "url" : "https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/a45Vm0000009SzZIAU?operationContext=S1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-336" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-23T21:17:05Z"
  }
}