CVE-2026-64084: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-m232-p3mf-6xc5
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CVSS 7.8
CWE-787
Published
Advisory Summary

CVE-2026-64084 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-787: Out-of-bounds Write) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product writes data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64084 at a Glance

CVE Identifier CVE-2026-64084
GHSA Identifier GHSA-m232-p3mf-6xc5
Severity HIGH
CVSS v3.1 Base Score 7.8
CWE Classification CWE-787: Out-of-bounds Write
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-2026-64084

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-2026-64084, 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-787: Out-of-bounds Write, where the product writes data past the end, or before the beginning, of the intended buffer. 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: hwmon: (pmbus/adm1266) cap PDIO scan in get_multiple at ADM1266_PDIO_NR adm1266_gpio_get_multiple() iterates the PDIO portion of the caller-supplied mask using for_each_set_bit_from(gpio_nr, mask, ADM1266_GPIO_NR + ADM1266_PDIO_STATUS) { ... } where ADM1266_PDIO_STATUS is the PMBus command code (0xE9, i.e. 233), not the number of PDIO pins. The intended upper bound is ADM1266_GPIO_NR + ADM1266_PDIO_NR = 25. gpiolib hands in a mask sized for gc.ngpio (= 25 bits on this chip), so the iteration walks find_next_bit() up to 242, reading up to 217 extra bits (a handful of unsigned-long words: four on 64-bit, seven on 32-bit) of whatever lives past the end of the mask in the caller's stack. Any incidental set bit in that range then drives a set_bit(gpio_nr, bits) call that writes past the end of the caller-supplied bits array too -- both out-of-bounds. Substitute ADM1266_PDIO_NR for the constant so the scan stops at the last real PDIO bit.

References

NVD — CVE-2026-64084 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64084
git.kernel.org/stable/c/17cee2f590... WEB
https://git.kernel.org/stable/c/17cee2f59029039416e8f6303050038eb59ba149
git.kernel.org/stable/c/299efd14c2... WEB
https://git.kernel.org/stable/c/299efd14c2eda7e5fd40025e54addd4151a01081
git.kernel.org/stable/c/2aef8f08c4... WEB
https://git.kernel.org/stable/c/2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17
git.kernel.org/stable/c/4d1da9a6be... WEB
https://git.kernel.org/stable/c/4d1da9a6be5a8156c532d571c2ed237169f99244
git.kernel.org/stable/c/b96c7f0bc0... WEB
https://git.kernel.org/stable/c/b96c7f0bc0713dc6403912f6527d4ff9168d6fe6
git.kernel.org/stable/c/d0593e15fd... WEB
https://git.kernel.org/stable/c/d0593e15fdeb56048a72c5c6e720f702759d0ccd
git.kernel.org/stable/c/d7834d9225... WEB
https://git.kernel.org/stable/c/d7834d92251baade796812876e95555e2066fa9f
git.kernel.org/stable/c/fa7ca36306... WEB
https://git.kernel.org/stable/c/fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec

Frequently Asked Questions

What is CVE-2026-64084?
CVE-2026-64084 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-787: Out-of-bounds Write.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64084?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64084?
CVE-2026-64084 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-2026-64084?
CVE-2026-64084 is classified under CWE-787: Out-of-bounds Write (The product writes data past the end, or before the beginning, of the intended buffer.).
How can I check Maven dependencies for CVE-2026-64084?
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-m232-p3mf-6xc5",
  "modified" : "2026-07-20T15:31:58Z",
  "published" : "2026-07-19T18:31:51Z",
  "aliases" : [ "CVE-2026-64084" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (pmbus/adm1266) cap PDIO scan in get_multiple at ADM1266_PDIO_NR\n\nadm1266_gpio_get_multiple() iterates the PDIO portion of the\ncaller-supplied mask using\n\n\tfor_each_set_bit_from(gpio_nr, mask,\n\t\t\t      ADM1266_GPIO_NR + ADM1266_PDIO_STATUS) {\n\t\t...\n\t}\n\nwhere ADM1266_PDIO_STATUS is the PMBus command code (0xE9, i.e. 233),\nnot the number of PDIO pins.  The intended upper bound is\nADM1266_GPIO_NR + ADM1266_PDIO_NR = 25.\n\ngpiolib hands in a mask sized for gc.ngpio (= 25 bits on this chip),\nso the iteration walks find_next_bit() up to 242, reading up to 217\nextra bits (a handful of unsigned-long words: four on 64-bit, seven\non 32-bit) of whatever lives past the end of the mask in the\ncaller's stack.  Any incidental set bit in that range then drives a\nset_bit(gpio_nr, bits) call that writes past the end of the\ncaller-supplied bits array too -- both out-of-bounds.\n\nSubstitute ADM1266_PDIO_NR for the constant so the scan stops at the\nlast real PDIO bit.",
  "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-2026-64084"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/17cee2f59029039416e8f6303050038eb59ba149"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/299efd14c2eda7e5fd40025e54addd4151a01081"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/2aef8f08c479f4cbc83e1e6b19d1c94d4dd24f17"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4d1da9a6be5a8156c532d571c2ed237169f99244"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/b96c7f0bc0713dc6403912f6527d4ff9168d6fe6"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d0593e15fdeb56048a72c5c6e720f702759d0ccd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d7834d92251baade796812876e95555e2066fa9f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/fa7ca363069a70b0d1aa51e8892e3095fe2ac1ec"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-787" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:49Z"
  }
}