CVE-2026-89965: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-gj9w-7mfp-hc5m
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CVSS 7.8
Published
Advisory Summary

CVE-2026-89965 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89965 at a Glance

CVE Identifier CVE-2026-89965
GHSA Identifier GHSA-gj9w-7mfp-hc5m
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
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-2026-89965

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-2026-89965, 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: nvdimm/btt: reject an arena whose nfree is below the lane count The BTT info block's nfree field, the number of reserve free blocks, is read from the medium without validation. btt_freelist_init() and btt_rtt_init() size the per-lane freelist[] and rtt[] arrays by nfree, but the I/O path indexes them by the lane from nd_region_acquire_lane(), which is bounded by nd_region->num_lanes (ND_MAX_LANES), not by nfree. A crafted or foreign arena whose nfree is below the lane count makes freelist[lane]/rtt[lane] run past the allocation: an out-of-bounds write. btt.rst documents the nlanes = min(nfree, num_cpus) invariant, which the code does not currently honor: num_lanes is ND_MAX_LANES regardless of nfree. Reject an arena whose nfree is below num_lanes at discovery, before the per-lane arrays are allocated, enforcing that invariant.

References

NVD — CVE-2026-89965 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89965
git.kernel.org/stable/c/59d5cd1f42... WEB
https://git.kernel.org/stable/c/59d5cd1f42b4bab3609512c3cb3d3540d3d21da7
git.kernel.org/stable/c/6a1f2e5ed9... WEB
https://git.kernel.org/stable/c/6a1f2e5ed9267ca19187038ac635393c165213ac
git.kernel.org/stable/c/6b1faf1f09... WEB
https://git.kernel.org/stable/c/6b1faf1f099f7060b5f1f2f0d024132581f1726e
git.kernel.org/stable/c/6f79d1a5f2... WEB
https://git.kernel.org/stable/c/6f79d1a5f2611a3d36e9312be5425cd9cb397c51
git.kernel.org/stable/c/9dfa11cef4... WEB
https://git.kernel.org/stable/c/9dfa11cef4750b67591307f2c62e47a23d60e4b7
git.kernel.org/stable/c/eb491343d2... WEB
https://git.kernel.org/stable/c/eb491343d2d1784121ad9af91c25b338c28913c3
git.kernel.org/stable/c/f6c5313aae... WEB
https://git.kernel.org/stable/c/f6c5313aae794ecca8f762c1a3493de5c266f120
git.kernel.org/stable/c/f9bf05c63b... WEB
https://git.kernel.org/stable/c/f9bf05c63b77d000e9c01f3e47af36973887d350

Frequently Asked Questions

What is CVE-2026-89965?
CVE-2026-89965 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-2026-89965?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89965?
CVE-2026-89965 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-2026-89965?
CVE-2026-89965 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89965?
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-gj9w-7mfp-hc5m",
  "modified" : "2026-09-16T15:31:03Z",
  "published" : "2026-09-16T12:30:43Z",
  "aliases" : [ "CVE-2026-89965" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnvdimm/btt: reject an arena whose nfree is below the lane count\n\nThe BTT info block's nfree field, the number of reserve free blocks, is\nread from the medium without validation.  btt_freelist_init() and\nbtt_rtt_init() size the per-lane freelist[] and rtt[] arrays by nfree,\nbut the I/O path indexes them by the lane from nd_region_acquire_lane(),\nwhich is bounded by nd_region->num_lanes (ND_MAX_LANES), not by nfree.\nA crafted or foreign arena whose nfree is below the lane count makes\nfreelist[lane]/rtt[lane] run past the allocation: an out-of-bounds write.\n\nbtt.rst documents the nlanes = min(nfree, num_cpus) invariant, which the\ncode does not currently honor: num_lanes is ND_MAX_LANES regardless of\nnfree.  Reject an arena whose nfree is below num_lanes at discovery,\nbefore the per-lane arrays are allocated, enforcing that invariant.",
  "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-2026-89965"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/59d5cd1f42b4bab3609512c3cb3d3540d3d21da7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6a1f2e5ed9267ca19187038ac635393c165213ac"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6b1faf1f099f7060b5f1f2f0d024132581f1726e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6f79d1a5f2611a3d36e9312be5425cd9cb397c51"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9dfa11cef4750b67591307f2c62e47a23d60e4b7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/eb491343d2d1784121ad9af91c25b338c28913c3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f6c5313aae794ecca8f762c1a3493de5c266f120"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f9bf05c63b77d000e9c01f3e47af36973887d350"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T11:17:07Z"
  }
}