CVE-2026-64271: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-v33c-vvwm-9mr7
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CVSS 7.8
CWE-129
Published
Advisory Summary

CVE-2026-64271 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-129: Improper Validation of Array Index) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64271 at a Glance

CVE Identifier CVE-2026-64271
GHSA Identifier GHSA-v33c-vvwm-9mr7
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-129: Improper Validation of Array Index
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-2026-64271

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-2026-64271, 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 CWE-129: Improper Validation of Array Index, where the product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array. 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: Input: touchwin - reset the packet index on every complete packet tw_interrupt() accumulates each non-zero serial byte into a fixed three-byte buffer with a running index that is only reset once a full packet has been received *and* the device's two Y bytes agree: tw->data[tw->idx++] = data; if (tw->idx == TW_LENGTH && tw->data[1] == tw->data[2]) { ... tw->idx = 0; } The reset is gated on tw->data[1] == tw->data[2], a value the device controls. A malicious, malfunctioning or counterfeit Touchwindow peripheral can stream non-zero bytes whose 2nd and 3rd bytes differ: the index reaches TW_LENGTH without the equality holding, is never reset, and keeps growing, so tw->data[tw->idx++] walks off the end of the three-byte array and the rest of the heap-allocated struct tw, one attacker-chosen byte at a time -- an unbounded, device-driven heap out-of-bounds write. Reset the index on every completed packet and report an event only when the two Y bytes match, like the other serio touchscreen drivers do.

References

NVD — CVE-2026-64271 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64271
git.kernel.org/stable/c/044167cba2... WEB
https://git.kernel.org/stable/c/044167cba2384bcd783547ad5e30ecd292b30919
git.kernel.org/stable/c/3e6f007b43... WEB
https://git.kernel.org/stable/c/3e6f007b43e2fc6546e21fa74ee62c38984a6672
git.kernel.org/stable/c/431ad239f2... WEB
https://git.kernel.org/stable/c/431ad239f2924dff337c3fccb9246597c1b63185
git.kernel.org/stable/c/478cdd736f... WEB
https://git.kernel.org/stable/c/478cdd736f2ce3114f90e775d7358136d3977b94
git.kernel.org/stable/c/6c9f29f128... WEB
https://git.kernel.org/stable/c/6c9f29f128dd4057404838259af4c645318487e1
git.kernel.org/stable/c/70e4248793... WEB
https://git.kernel.org/stable/c/70e4248793762df9832fd4fc2fc6ac7924572c36
git.kernel.org/stable/c/a8d8718457... WEB
https://git.kernel.org/stable/c/a8d87184576c889759e3aab899799a482f1e1a5b
git.kernel.org/stable/c/ed9b669054... WEB
https://git.kernel.org/stable/c/ed9b66905407eb3d02df1aaeed82eb7a7f0eb508

Frequently Asked Questions

What is CVE-2026-64271?
CVE-2026-64271 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-129: Improper Validation of Array Index.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64271?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64271?
CVE-2026-64271 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-2026-64271?
CVE-2026-64271 is classified under CWE-129: Improper Validation of Array Index (The product uses untrusted input when calculating or using an array index, but the product does not validate or incorrectly validates the index to ensure the index references a valid position within the array.).
How can I check Maven dependencies for CVE-2026-64271?
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-v33c-vvwm-9mr7",
  "modified" : "2026-08-13T18:31:10Z",
  "published" : "2026-07-25T12:31:28Z",
  "aliases" : [ "CVE-2026-64271" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: touchwin - reset the packet index on every complete packet\n\ntw_interrupt() accumulates each non-zero serial byte into a fixed\nthree-byte buffer with a running index that is only reset once a full\npacket has been received *and* the device's two Y bytes agree:\n\n\ttw->data[tw->idx++] = data;\n\tif (tw->idx == TW_LENGTH && tw->data[1] == tw->data[2]) {\n\t\t...\n\t\ttw->idx = 0;\n\t}\n\nThe reset is gated on tw->data[1] == tw->data[2], a value the device\ncontrols.  A malicious, malfunctioning or counterfeit Touchwindow\nperipheral can stream non-zero bytes whose 2nd and 3rd bytes differ: the\nindex reaches TW_LENGTH without the equality holding, is never reset, and\nkeeps growing, so tw->data[tw->idx++] walks off the end of the three-byte\narray and the rest of the heap-allocated struct tw, one attacker-chosen\nbyte at a time -- an unbounded, device-driven heap out-of-bounds write.\n\nReset the index on every completed packet and report an event only when\nthe two Y bytes match, like the other serio touchscreen drivers do.",
  "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",
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  }, {
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    "url" : "https://git.kernel.org/stable/c/044167cba2384bcd783547ad5e30ecd292b30919"
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/478cdd736f2ce3114f90e775d7358136d3977b94"
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/ed9b66905407eb3d02df1aaeed82eb7a7f0eb508"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-129" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:07Z"
  }
}