CVE-2026-89839: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-hf9x-gfgm-hfj2
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Advisory Summary

CVE-2026-89839 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89839 at a Glance

CVE Identifier CVE-2026-89839
GHSA Identifier GHSA-hf9x-gfgm-hfj2
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-89839

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-2026-89839, 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: f2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set() f2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap before allowing the "system.advise" xattr to be set, instead of the idmap that the VFS passes to the ->set() handler. f2fs supports idmapped mounts, so on such a mount this checks the caller's fsuid against the unmapped on-disk owner rather than the mapped owner: the actual owner can be wrongly denied with -EPERM and an unrelated caller wrongly allowed. Pass the handler's idmap instead.

References

NVD — CVE-2026-89839 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89839
git.kernel.org/stable/c/3b681229e9... WEB
https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3
git.kernel.org/stable/c/4c0c610b48... WEB
https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1
git.kernel.org/stable/c/a54ffce463... WEB
https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576
git.kernel.org/stable/c/ab31e3b774... WEB
https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd
git.kernel.org/stable/c/c3e2692c7a... WEB
https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad

Frequently Asked Questions

What is CVE-2026-89839?
CVE-2026-89839 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-2026-89839?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-89839?
CVE-2026-89839 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89839?
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-hf9x-gfgm-hfj2",
  "modified" : "2026-09-16T12:30:38Z",
  "published" : "2026-09-16T12:30:38Z",
  "aliases" : [ "CVE-2026-89839" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: use the mount idmap for the owner check in f2fs_xattr_advise_set()\n\nf2fs_xattr_advise_set() calls inode_owner_or_capable() with &nop_mnt_idmap\nbefore allowing the \"system.advise\" xattr to be set, instead of the idmap\nthat the VFS passes to the ->set() handler.\n\nf2fs supports idmapped mounts, so on such a mount this checks the caller's\nfsuid against the unmapped on-disk owner rather than the mapped owner: the\nactual owner can be wrongly denied with -EPERM and an unrelated caller\nwrongly allowed.  Pass the handler's idmap instead.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89839"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3b681229e9f8fb1dd29bc65983bf3c87779e4ca3"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4c0c610b480cfbc57528aa1acbd6be12ed2a6fb1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a54ffce4637acb0db8e695188a6c7f99f14c3576"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ab31e3b774f5d06b4489cef6c297b48c47c9dcbd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c3e2692c7a58e0bdb84bd658d827e89dcecea3ad"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T11:16:50Z"
  }
}