CVE-2026-89471: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-543c-r37x-r759
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CVSS 8.4
Published
Advisory Summary

CVE-2026-89471 is a HIGH (CVSS 8.4) security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-89471 at a Glance

CVE Identifier CVE-2026-89471
GHSA Identifier GHSA-543c-r37x-r759
Severity HIGH
CVSS v3.1 Base Score 8.4
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 8.4

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:U/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 Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-89471

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-2026-89471, 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: power: supply: cros_usbpd-charger: bound the EC-reported port count cros_usbpd_charger_probe() reads two port counts from the EC and uses one of them, num_charger_ports, as the loop bound when populating a fixed-size array: struct port_data *ports[EC_USB_PD_MAX_PORTS]; /* 8 entries */ ... for (i = 0; i < charger->num_charger_ports; i++) charger->ports[charger->num_registered_psy++] = port; Both num_usbpd_ports (from EC_CMD_USB_PD_PORTS) and num_charger_ports (from EC_CMD_CHARGE_PORT_COUNT) are u8 values reported by the EC. The only validation is a sanity check that compares the two EC-reported values against each other: if (num_charger_ports < num_usbpd_ports || num_charger_ports > num_usbpd_ports + 1) return -EPROTO; It never checks either count against EC_USB_PD_MAX_PORTS, the size of the ports[] array. A malfunctioning, malicious or compromised EC that reports num_usbpd_ports == num_charger_ports == N for any N > 8 (for example both 255) passes this check, and the loop then writes N pointers into the 8-entry ports[] array embedded in the devm_kzalloc()'d charger_data, overflowing it by up to 255 - 8 = 247 entries (~1976 bytes): a slab out-of-bounds write. Reject a port count larger than the ports[] array can hold.

References

NVD — CVE-2026-89471 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89471
git.kernel.org/stable/c/0b5096f680... WEB
https://git.kernel.org/stable/c/0b5096f6804161b61451b1cec0e38678630be849
git.kernel.org/stable/c/2746d502b1... WEB
https://git.kernel.org/stable/c/2746d502b12b343384fb747bdef9cbcfbd7444a2
git.kernel.org/stable/c/3d1e01443b... WEB
https://git.kernel.org/stable/c/3d1e01443b221081258ff34ea0cdd0431e4ff62e
git.kernel.org/stable/c/48355ce493... WEB
https://git.kernel.org/stable/c/48355ce49359740f52e94d3623f6fc557ce341f0
git.kernel.org/stable/c/78be8b7403... WEB
https://git.kernel.org/stable/c/78be8b7403ff7638162438b664a07d19da76059e
git.kernel.org/stable/c/a1905375df... WEB
https://git.kernel.org/stable/c/a1905375dfc0b9612bbee52fc066e3a70c0d671d
git.kernel.org/stable/c/c46c9f4474... WEB
https://git.kernel.org/stable/c/c46c9f447415ca802afab51dea1eafc08ddff1c6
git.kernel.org/stable/c/fd29d08ee4... WEB
https://git.kernel.org/stable/c/fd29d08ee487f3bf50f2575aaa74f78a74b09b21

Frequently Asked Questions

What is CVE-2026-89471?
CVE-2026-89471 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-2026-89471?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-89471?
CVE-2026-89471 has a CVSS v3.1 base score of 8.4 (HIGH) with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-89471?
CVE-2026-89471 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-89471?
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-543c-r37x-r759",
  "modified" : "2026-09-14T15:32:25Z",
  "published" : "2026-09-11T21:31:27Z",
  "aliases" : [ "CVE-2026-89471" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: cros_usbpd-charger: bound the EC-reported port count\n\ncros_usbpd_charger_probe() reads two port counts from the EC and uses\none of them, num_charger_ports, as the loop bound when populating a\nfixed-size array:\n\n\tstruct port_data *ports[EC_USB_PD_MAX_PORTS];\t/* 8 entries */\n\t...\n\tfor (i = 0; i < charger->num_charger_ports; i++)\n\t\tcharger->ports[charger->num_registered_psy++] = port;\n\nBoth num_usbpd_ports (from EC_CMD_USB_PD_PORTS) and num_charger_ports\n(from EC_CMD_CHARGE_PORT_COUNT) are u8 values reported by the EC. The\nonly validation is a sanity check that compares the two EC-reported\nvalues against each other:\n\n\tif (num_charger_ports < num_usbpd_ports ||\n\t    num_charger_ports > num_usbpd_ports + 1)\n\t\treturn -EPROTO;\n\nIt never checks either count against EC_USB_PD_MAX_PORTS, the size of\nthe ports[] array. A malfunctioning, malicious or compromised EC that\nreports num_usbpd_ports == num_charger_ports == N for any N > 8 (for\nexample both 255) passes this check, and the loop then writes N pointers\ninto the 8-entry ports[] array embedded in the devm_kzalloc()'d\ncharger_data, overflowing it by up to 255 - 8 = 247 entries (~1976\nbytes): a slab out-of-bounds write.\n\nReject a port count larger than the ports[] array can hold.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/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-2026-89471"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0b5096f6804161b61451b1cec0e38678630be849"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2746d502b12b343384fb747bdef9cbcfbd7444a2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3d1e01443b221081258ff34ea0cdd0431e4ff62e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/48355ce49359740f52e94d3623f6fc557ce341f0"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/78be8b7403ff7638162438b664a07d19da76059e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/a1905375dfc0b9612bbee52fc066e3a70c0d671d"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c46c9f447415ca802afab51dea1eafc08ddff1c6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fd29d08ee487f3bf50f2575aaa74f78a74b09b21"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:28Z"
  }
}