CVE-2026-89669: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-76rg-3h22-jw6r
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CVSS 9.8
Published
Advisory Summary

CVE-2026-89669 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-2026-89669 at a Glance

CVE Identifier CVE-2026-89669
GHSA Identifier GHSA-76rg-3h22-jw6r
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-2026-89669

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-2026-89669, 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: nfsd: initialize copy-notify stateid before publishing it nfsd4_copy_notify() finished initializing the cpntf state after nfs4_alloc_init_cpntf_state() had already linked it into the s2s_cp_stateids IDR and the parent's sc_cp_list, with cs_count == 1 (the membership reference) and none held for the caller. A racing OFFLOAD_CANCEL (crafted cl_id == nn->s2s_cp_cl_id plus the guessable so_id) could reach manage_cpntf_state() and free the entry, turning the caller's subsequent cpn_cnr_stateid read and cp_p_stateid/cp_p_clid writes into use-after-free. The owning clientid was also only recorded after publication, so it could not gate an ownership check in that window. Record cp_p_stateid and cp_p_clid inside nfs4_alloc_init_cpntf_state() before nfs4_init_cp_state() publishes the entry, and return it with an extra reference. The caller reads the stateid under that reference and drops it with nfs4_put_cpntf_state(); on a late error the laundromat reaps the entry.

References

NVD — CVE-2026-89669 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89669
git.kernel.org/stable/c/129643893b... WEB
https://git.kernel.org/stable/c/129643893b79f8a3c6b72045f933fbab5ee424ca
git.kernel.org/stable/c/4415a69234... WEB
https://git.kernel.org/stable/c/4415a692346a39fdb647cbd717eda510159aaf55
git.kernel.org/stable/c/4cdef96892... WEB
https://git.kernel.org/stable/c/4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b
git.kernel.org/stable/c/863b6e9956... WEB
https://git.kernel.org/stable/c/863b6e995665472f2af5be2436a874ab6a9e5ac6
git.kernel.org/stable/c/9caad13b7c... WEB
https://git.kernel.org/stable/c/9caad13b7cfe9ccb90cc405ac77335800e086595
git.kernel.org/stable/c/a4d7fedcaa... WEB
https://git.kernel.org/stable/c/a4d7fedcaaf33e60a01e53eafca9041ef966212f
git.kernel.org/stable/c/d18d36395d... WEB
https://git.kernel.org/stable/c/d18d36395d973ef7372c8e6724970585f75b5c0b
git.kernel.org/stable/c/e08a3dcaca... WEB
https://git.kernel.org/stable/c/e08a3dcaca0505f861e344a387f37f94d95dbdc2

Frequently Asked Questions

What is CVE-2026-89669?
CVE-2026-89669 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-2026-89669?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89669?
CVE-2026-89669 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-2026-89669?
CVE-2026-89669 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89669?
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-76rg-3h22-jw6r",
  "modified" : "2026-09-14T15:32:33Z",
  "published" : "2026-09-11T21:31:35Z",
  "aliases" : [ "CVE-2026-89669" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: initialize copy-notify stateid before publishing it\n\nnfsd4_copy_notify() finished initializing the cpntf state after\nnfs4_alloc_init_cpntf_state() had already linked it into the\ns2s_cp_stateids IDR and the parent's sc_cp_list, with cs_count == 1 (the\nmembership reference) and none held for the caller. A racing\nOFFLOAD_CANCEL (crafted cl_id == nn->s2s_cp_cl_id plus the guessable\nso_id) could reach manage_cpntf_state() and free the entry, turning the\ncaller's subsequent cpn_cnr_stateid read and cp_p_stateid/cp_p_clid\nwrites into use-after-free. The owning clientid was also only recorded\nafter publication, so it could not gate an ownership check in that window.\n\nRecord cp_p_stateid and cp_p_clid inside nfs4_alloc_init_cpntf_state()\nbefore nfs4_init_cp_state() publishes the entry, and return it with an\nextra reference. The caller reads the stateid under that reference and\ndrops it with nfs4_put_cpntf_state(); on a late error the laundromat\nreaps the entry.",
  "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-2026-89669"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/129643893b79f8a3c6b72045f933fbab5ee424ca"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4415a692346a39fdb647cbd717eda510159aaf55"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4cdef96892f4fa6e70c405b6e8f2fd6972f3b64b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/863b6e995665472f2af5be2436a874ab6a9e5ac6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9caad13b7cfe9ccb90cc405ac77335800e086595"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a4d7fedcaaf33e60a01e53eafca9041ef966212f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d18d36395d973ef7372c8e6724970585f75b5c0b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e08a3dcaca0505f861e344a387f37f94d95dbdc2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:53Z"
  }
}