CVE-2026-89963: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-57qc-5c9v-2jq5
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Advisory Summary

CVE-2026-89963 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-2026-89963 at a Glance

CVE Identifier CVE-2026-89963
GHSA Identifier GHSA-57qc-5c9v-2jq5
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-2026-89963

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-2026-89963, 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: powerpc/kexec_file: Fix null-ptr-def in extra size calculation A static Sashiko AI review identified a potential NULL pointer dereference in kexec_extra_fdt_size_ppc64(). On platforms without any reserved memory regions, get_reserved_memory_ranges() can return 0 while leaving 'rmem' unallocated as NULL. Passing it directly leads to a kernel panic when evaluating 'rmem->nr_ranges'. Add a NULL check for 'rmem' to prevent this crash.

References

NVD — CVE-2026-89963 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89963
git.kernel.org/stable/c/11ef1c2a5d... WEB
https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf
git.kernel.org/stable/c/4ff3d9fd71... WEB
https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea
git.kernel.org/stable/c/761eda315a... WEB
https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29
git.kernel.org/stable/c/df45337587... WEB
https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb

Frequently Asked Questions

What is CVE-2026-89963?
CVE-2026-89963 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-2026-89963?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-89963?
CVE-2026-89963 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89963?
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-57qc-5c9v-2jq5",
  "modified" : "2026-09-16T12:30:43Z",
  "published" : "2026-09-16T12:30:43Z",
  "aliases" : [ "CVE-2026-89963" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/kexec_file: Fix null-ptr-def in extra size calculation\n\nA static Sashiko AI review identified a potential NULL pointer\ndereference in kexec_extra_fdt_size_ppc64().\n\nOn platforms without any reserved memory regions,\nget_reserved_memory_ranges() can return 0 while leaving 'rmem'\nunallocated as NULL. Passing it directly leads to a kernel panic when\nevaluating 'rmem->nr_ranges'.\n\nAdd a NULL check for 'rmem' to prevent this crash.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89963"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/11ef1c2a5dbe0bd8c1345f59bab7331d352f02cf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4ff3d9fd71c7bc2fc81afdac1970d9c55a5c0dea"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/761eda315a6e1fda3e8e2185b28430771fb1ac29"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/df45337587db21c502fe5251d3bcc7887428f4fb"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T11:17:06Z"
  }
}