CVE-2026-89684: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-83g2-j7m2-94hx
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CVSS 7.5
Published
Advisory Summary

CVE-2026-89684 is a HIGH (CVSS 7.5) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89684 at a Glance

CVE Identifier CVE-2026-89684
GHSA Identifier GHSA-83g2-j7m2-94hx
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.5

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

How to Fix CVE-2026-89684

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-2026-89684, 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: fix cpntf publish race in nfs4_init_cp_state nfs4_alloc_init_cpntf_state() published the new cpntf entry into the s2s_cp_stateids IDR (with cs_type set) in one s2s_cp_lock section, then took the lock again to list_add() it onto p_stid->sc_cp_list. In the gap the entry is reachable by so_id but cp_list is still {NULL,NULL} from kzalloc. A racing OFFLOAD_CANCEL (so_id is echoed to the client as cnr_stateid, so any NFSv4.2 client can drive it) reaches manage_cpntf_state() -> _free_cpntf_state_locked() and does list_del() on the zeroed list_head, oopsing the server. Fold the cs_type assignment and the list_add() into the same critical section as idr_alloc_cyclic(), so a concurrent lookup either misses the entry or sees a fully linked cp_list. INIT_LIST_HEAD() the entry after allocation and switch _free_cpntf_state_locked() to list_del_init() so a stale unlink is a no-op. nfs4_init_copy_state() passes NULL p_stid and skips the list_add, preserving NFS4_COPY_STID semantics.

References

NVD — CVE-2026-89684 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89684
git.kernel.org/stable/c/21d6c5957f... WEB
https://git.kernel.org/stable/c/21d6c5957f5ca97d7352e60f55ea412beb9419f5
git.kernel.org/stable/c/63e18fc655... WEB
https://git.kernel.org/stable/c/63e18fc65587fd3f7b4c6d70e96d32fc41d82ba3
git.kernel.org/stable/c/6ac469a274... WEB
https://git.kernel.org/stable/c/6ac469a274e3c7d87fc46ba46d83b95009680407
git.kernel.org/stable/c/8eeca99335... WEB
https://git.kernel.org/stable/c/8eeca993357a0bc35aaefebfd7462ac7b0a21d9a
git.kernel.org/stable/c/a631a26a87... WEB
https://git.kernel.org/stable/c/a631a26a8777bb235eabd478bbbaf26a4db750bf
git.kernel.org/stable/c/be3a5c1d85... WEB
https://git.kernel.org/stable/c/be3a5c1d857b0dcbc11796cea603ef25834f75b2
git.kernel.org/stable/c/bfeac42d90... WEB
https://git.kernel.org/stable/c/bfeac42d9074e539bacd1898dd8c14b7f5776620
git.kernel.org/stable/c/c7270f62e7... WEB
https://git.kernel.org/stable/c/c7270f62e7a05a2ee68aa2b74262b658a14463bd

Frequently Asked Questions

What is CVE-2026-89684?
CVE-2026-89684 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-2026-89684?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89684?
CVE-2026-89684 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-89684?
CVE-2026-89684 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89684?
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-83g2-j7m2-94hx",
  "modified" : "2026-09-14T15:32:33Z",
  "published" : "2026-09-11T21:31:36Z",
  "aliases" : [ "CVE-2026-89684" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnfsd: fix cpntf publish race in nfs4_init_cp_state\n\nnfs4_alloc_init_cpntf_state() published the new cpntf entry into the\ns2s_cp_stateids IDR (with cs_type set) in one s2s_cp_lock section, then\ntook the lock again to list_add() it onto p_stid->sc_cp_list. In the gap\nthe entry is reachable by so_id but cp_list is still {NULL,NULL} from\nkzalloc. A racing OFFLOAD_CANCEL (so_id is echoed to the client as\ncnr_stateid, so any NFSv4.2 client can drive it) reaches\nmanage_cpntf_state() -> _free_cpntf_state_locked() and does list_del() on\nthe zeroed list_head, oopsing the server.\n\nFold the cs_type assignment and the list_add() into the same critical\nsection as idr_alloc_cyclic(), so a concurrent lookup either misses the\nentry or sees a fully linked cp_list. INIT_LIST_HEAD() the entry after\nallocation and switch _free_cpntf_state_locked() to list_del_init() so a\nstale unlink is a no-op. nfs4_init_copy_state() passes NULL p_stid and\nskips the list_add, preserving NFS4_COPY_STID semantics.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89684"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/21d6c5957f5ca97d7352e60f55ea412beb9419f5"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/63e18fc65587fd3f7b4c6d70e96d32fc41d82ba3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6ac469a274e3c7d87fc46ba46d83b95009680407"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/8eeca993357a0bc35aaefebfd7462ac7b0a21d9a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a631a26a8777bb235eabd478bbbaf26a4db750bf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/be3a5c1d857b0dcbc11796cea603ef25834f75b2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bfeac42d9074e539bacd1898dd8c14b7f5776620"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c7270f62e7a05a2ee68aa2b74262b658a14463bd"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:55Z"
  }
}