CVE-2026-89494: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-hhc4-rpwx-gp2p
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CVSS 9.8
Published
Advisory Summary

CVE-2026-89494 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-2026-89494 at a Glance

CVE Identifier CVE-2026-89494
GHSA Identifier GHSA-hhc4-rpwx-gp2p
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-2026-89494

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-2026-89494, 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: ocfs2: validate lengths in dlm_mig_lockres_handler A node receiving a DLM_MIG_LOCKRES message trusts several fields of the peer-supplied dlm_migratable_lockres without validation. num_locks and lockname_len are bounded only on the sending side, and the message is never checked to actually carry num_locks migratable_lock entries. As a result dlm_process_recovery_data() walks mres->ml[0..num_locks) past the kmalloc(data_len) copy of the message (an out-of-bounds read that ends in a BUG_ON panic), and dlm_init_lockres() copies lockname_len bytes into the fixed 32-byte o2dlm_lockname slab object (a heap out-of-bounds write). Both are reachable by any node in the domain. Validate these fields right after dlm_grab(), before anything uses them -- including the not-joined error path, which already prints mres->lockname with the unbounded lockname_len as a %.*s precision. Reject the message unless lockname_len <= DLM_LOCKID_NAME_MAX, num_locks <= DLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and the payload is large enough to hold the claimed locks. Conforming recovery and migration messages are unaffected.

References

NVD — CVE-2026-89494 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89494
git.kernel.org/stable/c/0e999d5691... WEB
https://git.kernel.org/stable/c/0e999d56917f861f97adb961617b1828c9eb4733
git.kernel.org/stable/c/4a57982532... WEB
https://git.kernel.org/stable/c/4a5798253212093b9ff7d90c6cfbe348bcda1594
git.kernel.org/stable/c/50c4cc9183... WEB
https://git.kernel.org/stable/c/50c4cc9183e11f83427efbf770f54851f4471c02
git.kernel.org/stable/c/77686fa5bb... WEB
https://git.kernel.org/stable/c/77686fa5bba135252d348e2dacf481fc19f60c41
git.kernel.org/stable/c/a8facb1670... WEB
https://git.kernel.org/stable/c/a8facb1670b4a0612183198e758d9539ef628ed9
git.kernel.org/stable/c/b54e03d9b3... WEB
https://git.kernel.org/stable/c/b54e03d9b3697d25f4a0063cf717d459c5e3ad94
git.kernel.org/stable/c/dce05b17db... WEB
https://git.kernel.org/stable/c/dce05b17db862f47ff60614017abe639b2e71cad
git.kernel.org/stable/c/f330419068... WEB
https://git.kernel.org/stable/c/f33041906885f96e190cde54e61ddc69de39e3ee

Frequently Asked Questions

What is CVE-2026-89494?
CVE-2026-89494 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-2026-89494?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89494?
CVE-2026-89494 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-2026-89494?
CVE-2026-89494 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89494?
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-hhc4-rpwx-gp2p",
  "modified" : "2026-09-14T15:32:27Z",
  "published" : "2026-09-11T21:31:29Z",
  "aliases" : [ "CVE-2026-89494" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: validate lengths in dlm_mig_lockres_handler\n\nA node receiving a DLM_MIG_LOCKRES message trusts several fields of the\npeer-supplied dlm_migratable_lockres without validation.  num_locks and\nlockname_len are bounded only on the sending side, and the message is\nnever checked to actually carry num_locks migratable_lock entries.  As a\nresult dlm_process_recovery_data() walks mres->ml[0..num_locks) past the\nkmalloc(data_len) copy of the message (an out-of-bounds read that ends in\na BUG_ON panic), and dlm_init_lockres() copies lockname_len bytes into the\nfixed 32-byte o2dlm_lockname slab object (a heap out-of-bounds write). \nBoth are reachable by any node in the domain.\n\nValidate these fields right after dlm_grab(), before anything uses them --\nincluding the not-joined error path, which already prints mres->lockname\nwith the unbounded lockname_len as a %.*s precision.  Reject the message\nunless lockname_len <= DLM_LOCKID_NAME_MAX, num_locks <=\nDLM_MAX_MIGRATABLE_LOCKS (the bound the sender already asserts), and the\npayload is large enough to hold the claimed locks.  Conforming recovery\nand migration messages are unaffected.",
  "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-2026-89494"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0e999d56917f861f97adb961617b1828c9eb4733"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4a5798253212093b9ff7d90c6cfbe348bcda1594"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/50c4cc9183e11f83427efbf770f54851f4471c02"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/77686fa5bba135252d348e2dacf481fc19f60c41"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a8facb1670b4a0612183198e758d9539ef628ed9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b54e03d9b3697d25f4a0063cf717d459c5e3ad94"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/dce05b17db862f47ff60614017abe639b2e71cad"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f33041906885f96e190cde54e61ddc69de39e3ee"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:31Z"
  }
}