CVE-2026-89918: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-hcq6-hvjh-vf66
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CVSS 9.3
Published
Advisory Summary

CVE-2026-89918 is a CRITICAL (CVSS 9.3) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89918 at a Glance

CVE Identifier CVE-2026-89918
GHSA Identifier GHSA-hcq6-hvjh-vf66
Severity CRITICAL
CVSS v3.1 Base Score 9.3
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.3

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

Attack Vector Local (AV:L)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-89918

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-2026-89918, 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: KVM: arm64: Correctly handle end of VA space TLBI invalidation Our TLB invalidation by VA code is based on comparing two ranges, one defined by the TLB, and one defined by the TLBI instruction. Each range is defined by a start and a size. However, the way the comparison is done doesn't account for address rollover, as it compares an address with (base + size). This works nicely until this expression represent the last page/block in the TTBR1 VA space, as the result is a big fat 0. And a failed TLB invalidation. Rewrite the comparison in a way that is immune to the address rollover (making the end address inclusive instead of exclusive), and move this into a common helper that is used by both VA and IPA invalidations, as suggested by Hyunwoo Kim (although the IPA version didn't suffer from this particular problem, obviously).

References

NVD — CVE-2026-89918 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89918
git.kernel.org/stable/c/34af2c3e31... WEB
https://git.kernel.org/stable/c/34af2c3e31f91a739dc175459fdbd99ed952b457
git.kernel.org/stable/c/c624731ca6... WEB
https://git.kernel.org/stable/c/c624731ca6fe59ad8909ce4108301aa7560a91d6
git.kernel.org/stable/c/ce447651a5... WEB
https://git.kernel.org/stable/c/ce447651a52ec077694172af10c4fffb11f56c43

Frequently Asked Questions

What is CVE-2026-89918?
CVE-2026-89918 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-2026-89918?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89918?
CVE-2026-89918 has a CVSS v3.1 base score of 9.3 (CRITICAL) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89918?
CVE-2026-89918 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89918?
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-hcq6-hvjh-vf66",
  "modified" : "2026-09-16T15:31:02Z",
  "published" : "2026-09-16T12:30:41Z",
  "aliases" : [ "CVE-2026-89918" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Correctly handle end of VA space TLBI invalidation\n\nOur TLB invalidation by VA code is based on comparing two ranges,\none defined by the TLB, and one defined by the TLBI instruction.\n\nEach range is defined by a start and a size. However, the way the\ncomparison is done doesn't account for address rollover, as it\ncompares an address with (base + size). This works nicely until\nthis expression represent the last page/block in the TTBR1 VA space,\nas the result is a big fat 0. And a failed TLB invalidation.\n\nRewrite the comparison in a way that is immune to the address\nrollover (making the end address inclusive instead of exclusive),\nand move this into a common helper that is used by both VA and IPA\ninvalidations, as suggested by Hyunwoo Kim (although the IPA version\ndidn't suffer from this particular problem, obviously).",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-89918"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/34af2c3e31f91a739dc175459fdbd99ed952b457"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c624731ca6fe59ad8909ce4108301aa7560a91d6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ce447651a52ec077694172af10c4fffb11f56c43"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-16T11:17:00Z"
  }
}