CVE-2026-89570: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-5c9g-7vf9-4pwc
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CVSS 7.8
Published
Advisory Summary

CVE-2026-89570 is a HIGH (CVSS 7.8) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89570 at a Glance

CVE Identifier CVE-2026-89570
GHSA Identifier GHSA-5c9g-7vf9-4pwc
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.8

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required Low (PR:L)
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-2026-89570

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-2026-89570, 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: cxl/mce: Make the MCE notifier per-region Flavien Solt reported lifetime issues with the CXL MCE notifier, which can lead to NULL dereferences and use-after-free in the MCE handler. The notifier was registered per memory device and stored in 'struct cxl_memdev_state', even though it only needs the region state (the region's SPA range and its extended linear cache size). Instead of keeping the memory device and endpoint alive, the correct fix is to move the notifier into 'struct cxl_region' and register it from cxl_region_probe() as it should be a per-region notifier. Setup the registration to only happen for regions that have an extended linear cache as that is the only current usage. Remove cxl_port_get_spa_cache_alias() as it is now dead code. [ dj: Update dev_warn() when notifier fails due to kconfig. (Ben) ]

References

NVD — CVE-2026-89570 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89570
git.kernel.org/stable/c/491d8c9ac9... WEB
https://git.kernel.org/stable/c/491d8c9ac98d55073bda778f88a5248d4cce3fa0
git.kernel.org/stable/c/5563db13c9... WEB
https://git.kernel.org/stable/c/5563db13c9528a56c7161260ec75ec8690dc5608
git.kernel.org/stable/c/775d0f4558... WEB
https://git.kernel.org/stable/c/775d0f4558f4cec0ee0c8966595d1add1791f36e

Frequently Asked Questions

What is CVE-2026-89570?
CVE-2026-89570 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-2026-89570?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89570?
CVE-2026-89570 has a CVSS v3.1 base score of 7.8 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89570?
CVE-2026-89570 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89570?
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-5c9g-7vf9-4pwc",
  "modified" : "2026-09-13T09:32:19Z",
  "published" : "2026-09-11T21:31:32Z",
  "aliases" : [ "CVE-2026-89570" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\ncxl/mce: Make the MCE notifier per-region\n\nFlavien Solt reported lifetime issues with the CXL MCE notifier, which\ncan lead to NULL dereferences and use-after-free in the MCE handler.\nThe notifier was registered per memory device and stored in 'struct\ncxl_memdev_state', even though it only needs the region state (the\nregion's SPA range and its extended linear cache size).\n\nInstead of keeping the memory device and endpoint alive, the correct fix\nis to move the notifier into 'struct cxl_region' and register it from\ncxl_region_probe() as it should be a per-region notifier. Setup the\nregistration to only happen for regions that have an extended linear\ncache as that is the only current usage.\n\nRemove cxl_port_get_spa_cache_alias() as it is now dead code.\n\n[ dj: Update dev_warn() when notifier fails due to kconfig. (Ben) ]",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89570"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/491d8c9ac98d55073bda778f88a5248d4cce3fa0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/5563db13c9528a56c7161260ec75ec8690dc5608"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/775d0f4558f4cec0ee0c8966595d1add1791f36e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:41Z"
  }
}