CVE-2026-89622: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-hmph-x79p-jwjq
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CVSS 7.8
Published
Advisory Summary

CVE-2026-89622 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-2026-89622 at a Glance

CVE Identifier CVE-2026-89622
GHSA Identifier GHSA-hmph-x79p-jwjq
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-2026-89622

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-2026-89622, 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: HID: mcp2221: clear rxbuf after I2C/SMBus transfer completes mcp_i2c_smbus_read() stores the caller-supplied buffer pointer in mcp->rxbuf for the duration of a transfer but never clears it when the transfer finishes or times out. Once the caller frees or reuses the buffer, mcp->rxbuf becomes a dangling pointer. A delayed or spurious MCP2221_I2C_GET_DATA report can then drive mcp2221_raw_event() to memcpy device data into the freed memory, causing a write use-after-free. Route all return paths through a single exit point that clears mcp->rxbuf and mcp->rxbuf_size, so that the existing !mcp->rxbuf guard in the raw_event handler can reject any report arriving after the transfer has ended.

References

NVD — CVE-2026-89622 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89622
git.kernel.org/stable/c/03c34309eb... WEB
https://git.kernel.org/stable/c/03c34309eb1bce1b3b5f7c4a94b703f419120383
git.kernel.org/stable/c/968546b676... WEB
https://git.kernel.org/stable/c/968546b676d992dd1da3e057d40598231f725996
git.kernel.org/stable/c/d6c6b29317... WEB
https://git.kernel.org/stable/c/d6c6b293173c0ea87189501cbd77e8fa677814a1
git.kernel.org/stable/c/db2333f887... WEB
https://git.kernel.org/stable/c/db2333f88729c8aae062cb171ed058725ff5c901

Frequently Asked Questions

What is CVE-2026-89622?
CVE-2026-89622 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-2026-89622?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89622?
CVE-2026-89622 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-2026-89622?
CVE-2026-89622 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89622?
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-hmph-x79p-jwjq",
  "modified" : "2026-09-21T15:31:36Z",
  "published" : "2026-09-11T21:31:34Z",
  "aliases" : [ "CVE-2026-89622" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: mcp2221: clear rxbuf after I2C/SMBus transfer completes\n\nmcp_i2c_smbus_read() stores the caller-supplied buffer pointer in\nmcp->rxbuf for the duration of a transfer but never clears it when the\ntransfer finishes or times out. Once the caller frees or reuses the\nbuffer, mcp->rxbuf becomes a dangling pointer. A delayed or spurious\nMCP2221_I2C_GET_DATA report can then drive mcp2221_raw_event() to\nmemcpy device data into the freed memory, causing a write\nuse-after-free.\n\nRoute all return paths through a single exit point that clears\nmcp->rxbuf and mcp->rxbuf_size, so that the existing !mcp->rxbuf guard\nin the raw_event handler can reject any report arriving after the\ntransfer has ended.",
  "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-2026-89622"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/03c34309eb1bce1b3b5f7c4a94b703f419120383"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/968546b676d992dd1da3e057d40598231f725996"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d6c6b293173c0ea87189501cbd77e8fa677814a1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/db2333f88729c8aae062cb171ed058725ff5c901"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:47Z"
  }
}