CVE-2026-89489: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-9rpr-c8j9-pwgc
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CVSS 7.8
Published
Advisory Summary

CVE-2026-89489 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-2026-89489 at a Glance

CVE Identifier CVE-2026-89489
GHSA Identifier GHSA-9rpr-c8j9-pwgc
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-2026-89489

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-2026-89489, 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: openrisc: fix arbitrary kernel memory access via or1k_atomic syscall sys_or1k_atomic() (syscall 244 in the "or1k" ABI) takes two user pointers, v1 and v2, and swaps the words they point to in hand-written assembly. l.lwz r29,0(r4) l.lwz r27,0(r5) l.sw 0(r4),r27 l.sw 0(r5),r29 The pointers are not checked with access_ok(). The four memory accesses also have no exception table entries. A caller passes a kernel address as either pointer, and the syscall reads from and writes to it directly. This gives an unprivileged process a kernel read/write primitive. It overwrites kernel data such as the sys_call_table, gaining code execution in kernel context. Check both pointers before entering the critical section. Add fixups for the four memory accesses so faults on valid but unmapped user addresses return -EFAULT. [shorne@gmail.com: fix comment style]

References

NVD — CVE-2026-89489 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89489
git.kernel.org/stable/c/1f2e92e499... WEB
https://git.kernel.org/stable/c/1f2e92e499d863f81df1732af59b4a3559969193
git.kernel.org/stable/c/497cba0b02... WEB
https://git.kernel.org/stable/c/497cba0b02e5555d99fe9ee1dc478af743ab7f7a
git.kernel.org/stable/c/574ae2ac2b... WEB
https://git.kernel.org/stable/c/574ae2ac2b314aa33498cd2c28add106cbe644f2
git.kernel.org/stable/c/78004e9a87... WEB
https://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7
git.kernel.org/stable/c/a520e8cac5... WEB
https://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9
git.kernel.org/stable/c/b53435c079... WEB
https://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34
git.kernel.org/stable/c/bf310718c6... WEB
https://git.kernel.org/stable/c/bf310718c6fa6adeee06d207a55489546d860e2c
git.kernel.org/stable/c/d64a75369c... WEB
https://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379

Frequently Asked Questions

What is CVE-2026-89489?
CVE-2026-89489 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-2026-89489?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89489?
CVE-2026-89489 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-2026-89489?
CVE-2026-89489 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89489?
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-9rpr-c8j9-pwgc",
  "modified" : "2026-09-14T15:32:26Z",
  "published" : "2026-09-11T21:31:28Z",
  "aliases" : [ "CVE-2026-89489" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nopenrisc: fix arbitrary kernel memory access via or1k_atomic syscall\n\nsys_or1k_atomic() (syscall 244 in the \"or1k\" ABI) takes two user\npointers, v1 and v2, and swaps the words they point to in hand-written\nassembly.\n\n    l.lwz   r29,0(r4)\n    l.lwz   r27,0(r5)\n    l.sw    0(r4),r27\n    l.sw    0(r5),r29\n\nThe pointers are not checked with access_ok(). The four memory\naccesses also have no exception table entries.\n\nA caller passes a kernel address as either pointer, and the syscall\nreads from and writes to it directly.\n\nThis gives an unprivileged process a kernel read/write primitive. It\noverwrites kernel data such as the sys_call_table, gaining code\nexecution in kernel context.\n\nCheck both pointers before entering the critical section. Add fixups\nfor the four memory accesses so faults on valid but unmapped user\naddresses return -EFAULT.\n\n[shorne@gmail.com: fix comment style]",
  "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-2026-89489"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1f2e92e499d863f81df1732af59b4a3559969193"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/497cba0b02e5555d99fe9ee1dc478af743ab7f7a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/574ae2ac2b314aa33498cd2c28add106cbe644f2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/78004e9a87f240df03e2f73120d291763c32e0a7"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a520e8cac54fb403f3800125b606f55fcad42cb9"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b53435c079c78f89f70a62dd5a322cca4e292b34"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/bf310718c6fa6adeee06d207a55489546d860e2c"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d64a75369cd0f2ee79afcc9d9ca34a3890989379"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:30Z"
  }
}