CVE-2026-89636: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-4452-h45j-w5mp
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CVSS 9.8
Published
Advisory Summary

CVE-2026-89636 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89636 at a Glance

CVE Identifier CVE-2026-89636
GHSA Identifier GHSA-4452-h45j-w5mp
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
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-2026-89636

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-2026-89636, 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: smb: client: clear ce->tgthint in free_tgts() When free_tgts() frees all structures in ce->tlist, ce->tgthint is left pointing to one of the freed cache_dfs_tgt structures. If ce->tgthint is not reset before it is used later, it results in a use-after-free. Set ce->tgthint to NULL in free_tgts() after the elements are freed to reflect that no elements remain.

References

NVD — CVE-2026-89636 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89636
git.kernel.org/stable/c/14f60e959b... WEB
https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6
git.kernel.org/stable/c/3ff9462bb7... WEB
https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55
git.kernel.org/stable/c/5baab40404... WEB
https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984
git.kernel.org/stable/c/7507bd1885... WEB
https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3
git.kernel.org/stable/c/9ab46a1379... WEB
https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa
git.kernel.org/stable/c/b1b741cf8e... WEB
https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700

Frequently Asked Questions

What is CVE-2026-89636?
CVE-2026-89636 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-2026-89636?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89636?
CVE-2026-89636 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89636?
CVE-2026-89636 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89636?
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-4452-h45j-w5mp",
  "modified" : "2026-09-14T15:32:32Z",
  "published" : "2026-09-11T21:31:34Z",
  "aliases" : [ "CVE-2026-89636" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: clear ce->tgthint in free_tgts()\n\nWhen free_tgts() frees all structures in ce->tlist, ce->tgthint\nis left pointing to one of the freed cache_dfs_tgt structures.\n\nIf ce->tgthint is not reset before it is used later, it results\nin a use-after-free.\n\nSet ce->tgthint to NULL in free_tgts() after the elements are\nfreed to reflect that no elements remain.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89636"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:49Z"
  }
}