CVE-2026-89743: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-ggmc-fhxw-v94j
Share
CVSS 7.7
Published
Advisory Summary

CVE-2026-89743 is a HIGH (CVSS 7.7) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89743 at a Glance

CVE Identifier CVE-2026-89743
GHSA Identifier GHSA-ggmc-fhxw-v94j
Severity HIGH
CVSS v3.1 Base Score 7.7
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.7

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-89743

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-2026-89743, 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: misc: nsm: bound the device-reported response length nsm_sendrecv_msg_locked() stores the virtqueue used-ring length reported by the NSM device into msg->resp.len without bounding it to the response buffer. A malicious or buggy backend can report a length larger than the response buffer; parse_resp_raw() then copies that many bytes out of the fixed buffer to user space, disclosing adjacent kernel heap (an out-of-bounds read). The request path already floors its length in fill_req_raw(); the response path lacks the symmetric check. Clamp the stored length to the size of the response buffer. Well-behaved devices report no more than the posted buffer size, so conforming traffic is unaffected.

References

NVD — CVE-2026-89743 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89743
git.kernel.org/stable/c/29e634a189... WEB
https://git.kernel.org/stable/c/29e634a18957acda11383a15ab98a91c4ae9e294
git.kernel.org/stable/c/2aa0fb9c96... WEB
https://git.kernel.org/stable/c/2aa0fb9c96f894a9c179a48e7522ea6705800adf
git.kernel.org/stable/c/339f19b9a6... WEB
https://git.kernel.org/stable/c/339f19b9a6171289b0e797deb8bda80b9a1fcc30
git.kernel.org/stable/c/808e530654... WEB
https://git.kernel.org/stable/c/808e530654a5354e6df78863a5d61e4d44e67235

Frequently Asked Questions

What is CVE-2026-89743?
CVE-2026-89743 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-2026-89743?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89743?
CVE-2026-89743 has a CVSS v3.1 base score of 7.7 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
What CWE is associated with CVE-2026-89743?
CVE-2026-89743 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89743?
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-ggmc-fhxw-v94j",
  "modified" : "2026-09-13T09:32:29Z",
  "published" : "2026-09-11T21:31:39Z",
  "aliases" : [ "CVE-2026-89743" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: nsm: bound the device-reported response length\n\nnsm_sendrecv_msg_locked() stores the virtqueue used-ring length reported\nby the NSM device into msg->resp.len without bounding it to the response\nbuffer. A malicious or buggy backend can report a length larger than the\nresponse buffer; parse_resp_raw() then copies that many bytes out of the\nfixed buffer to user space, disclosing adjacent kernel heap (an\nout-of-bounds read). The request path already floors its length in\nfill_req_raw(); the response path lacks the symmetric check.\n\nClamp the stored length to the size of the response buffer. Well-behaved\ndevices report no more than the posted buffer size, so conforming traffic\nis unaffected.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89743"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/29e634a18957acda11383a15ab98a91c4ae9e294"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2aa0fb9c96f894a9c179a48e7522ea6705800adf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/339f19b9a6171289b0e797deb8bda80b9a1fcc30"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/808e530654a5354e6df78863a5d61e4d44e67235"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:20:04Z"
  }
}