CVE-2026-89632: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-j6wx-7c3w-595c
Share
CVSS 8.2
Published
Advisory Summary

CVE-2026-89632 is a HIGH (CVSS 8.2) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89632 at a Glance

CVE Identifier CVE-2026-89632
GHSA Identifier GHSA-j6wx-7c3w-595c
Severity HIGH
CVSS v3.1 Base Score 8.2
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.2

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:L/I:N/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 Low (C:L)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-89632

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-2026-89632, 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: fix use-before-check of ReparseDataLength in reparse_buf_ptr() reparse_buf_ptr() reads buf->ReparseDataLength before checking that count covers the full fixed header: buf = (struct reparse_data_buffer *)((u8 *)io + off); len = sizeof(*buf); /* 8 bytes */ rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */ if (count < len || count < rdlen + len) /* check comes after */ struct reparse_data_buffer has ReparseDataLength at offset 4. If a server returns OutputCount < 6, the read at offset 4-5 reaches past the end of the received data. The off+count bounds against iov_len were already validated, but that does not protect against count being smaller than sizeof(*buf). Split the check: verify count >= sizeof(*buf) before reading ReparseDataLength, then verify count covers the data region.

References

NVD — CVE-2026-89632 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89632
git.kernel.org/stable/c/05f78e6cf3... WEB
https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5
git.kernel.org/stable/c/711cf71300... WEB
https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f

Frequently Asked Questions

What is CVE-2026-89632?
CVE-2026-89632 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-2026-89632?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89632?
CVE-2026-89632 has a CVSS v3.1 base score of 8.2 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
What CWE is associated with CVE-2026-89632?
CVE-2026-89632 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89632?
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-j6wx-7c3w-595c",
  "modified" : "2026-09-13T09:32:25Z",
  "published" : "2026-09-11T21:31:34Z",
  "aliases" : [ "CVE-2026-89632" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr()\n\nreparse_buf_ptr() reads buf->ReparseDataLength before checking that\ncount covers the full fixed header:\n\n    buf = (struct reparse_data_buffer *)((u8 *)io + off);\n    len = sizeof(*buf);                          /* 8 bytes */\n    rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */\n\n    if (count < len || count < rdlen + len)      /* check comes after */\n\nstruct reparse_data_buffer has ReparseDataLength at offset 4.  If a\nserver returns OutputCount < 6, the read at offset 4-5 reaches past\nthe end of the received data.  The off+count bounds against iov_len\nwere already validated, but that does not protect against count being\nsmaller than sizeof(*buf).\n\nSplit the check: verify count >= sizeof(*buf) before reading\nReparseDataLength, then verify count covers the data region.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89632"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:48Z"
  }
}