CVE-2026-64403: Software Security Vulnerability Vulnerability

HIGH
Advisory Identifier: GHSA-wqwg-v9cc-cpq7
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CVSS 7.1
CWE-125 CWE-476
Published
Advisory Summary

CVE-2026-64403 is a HIGH (CVSS 7.1) security vulnerability vulnerability (CWE-125: Out-of-bounds Read) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reads data past the end, or before the beginning, of the intended buffer.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64403 at a Glance

CVE Identifier CVE-2026-64403
GHSA Identifier GHSA-wqwg-v9cc-cpq7
Severity HIGH
CVSS v3.1 Base Score 7.1
CWE Classification CWE-125: Out-of-bounds Read
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 7.1

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H).

Attack Vector Adjacent (AV:A)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-64403

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-2026-64403, 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-125: Out-of-bounds Read, where the product reads 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: Bluetooth: L2CAP: validate option length before reading conf opt value l2cap_get_conf_opt() derives the option length from the attacker-controlled opt->len field and immediately dereferences opt->val (as u8, get_unaligned_le16() or get_unaligned_le32(), or a raw pointer for the default case) before any caller has confirmed that opt->len bytes are present in the buffer. The callers (l2cap_parse_conf_req(), l2cap_parse_conf_rsp() and l2cap_conf_rfc_get()) only detect a malformed option afterwards, once the running length has gone negative, by which point the out-of-bounds read has already executed. An existing post-hoc length check keeps the garbage value from being consumed, so this is not a data leak in the current control flow. It is still a validate-after-use ordering bug: up to 4 bytes are read past the end of the buffer before it is known to contain them, and it is fragile to future changes in the callers. Fix it at the source. Pass the end of the buffer into l2cap_get_conf_opt() and refuse to touch opt->val unless the full option (header + value) fits. Each caller computes an end pointer once before the loop and checks the return value directly instead of inferring the error from a negative length.

References

NVD — CVE-2026-64403 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64403
git.kernel.org/stable/c/687617555c... WEB
https://git.kernel.org/stable/c/687617555cedfb74c9e3cb85d759b908dcb17856
git.kernel.org/stable/c/6b47bdaacf... WEB
https://git.kernel.org/stable/c/6b47bdaacfd0045687880177e0987055d8f4765a
git.kernel.org/stable/c/73abbaf91a... WEB
https://git.kernel.org/stable/c/73abbaf91aa33da87c008fb62c148ade561bb606
git.kernel.org/stable/c/7d871e969b... WEB
https://git.kernel.org/stable/c/7d871e969b941ce25653f7716203a0ea4d07ad4b
git.kernel.org/stable/c/98d93c226b... WEB
https://git.kernel.org/stable/c/98d93c226bdfaa79bbdd86981921d7f106374225
git.kernel.org/stable/c/996d3da398... WEB
https://git.kernel.org/stable/c/996d3da39899aceb8f4910911a3f19a45a7d9d1b
git.kernel.org/stable/c/cca81b4bc6... WEB
https://git.kernel.org/stable/c/cca81b4bc672604a84f6d224a55cc77ec7dee619
git.kernel.org/stable/c/f70d4aa880... WEB
https://git.kernel.org/stable/c/f70d4aa88068096f35d73e3a05eff33c0a16b9cd

Frequently Asked Questions

What is CVE-2026-64403?
CVE-2026-64403 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-125: Out-of-bounds Read.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64403?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64403?
CVE-2026-64403 has a CVSS v3.1 base score of 7.1 (HIGH) with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H.
What CWE is associated with CVE-2026-64403?
CVE-2026-64403 is classified under CWE-125: Out-of-bounds Read (The product reads data past the end, or before the beginning, of the intended buffer.).
How can I check Maven dependencies for CVE-2026-64403?
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-wqwg-v9cc-cpq7",
  "modified" : "2026-07-27T06:30:36Z",
  "published" : "2026-07-25T12:31:34Z",
  "aliases" : [ "CVE-2026-64403" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: L2CAP: validate option length before reading conf opt value\n\nl2cap_get_conf_opt() derives the option length from the\nattacker-controlled opt->len field and immediately dereferences\nopt->val (as u8, get_unaligned_le16() or get_unaligned_le32(), or a\nraw pointer for the default case) before any caller has confirmed\nthat opt->len bytes are present in the buffer. The callers\n(l2cap_parse_conf_req(), l2cap_parse_conf_rsp() and\nl2cap_conf_rfc_get()) only detect a malformed option afterwards, once\nthe running length has gone negative, by which point the\nout-of-bounds read has already executed.\n\nAn existing post-hoc length check keeps the garbage value from being\nconsumed, so this is not a data leak in the current control flow. It\nis still a validate-after-use ordering bug: up to 4 bytes are read\npast the end of the buffer before it is known to contain them, and it\nis fragile to future changes in the callers.\n\nFix it at the source. Pass the end of the buffer into\nl2cap_get_conf_opt() and refuse to touch opt->val unless the full\noption (header + value) fits. Each caller computes an end pointer\nonce before the loop and checks the return value directly instead of\ninferring the error from a negative length.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64403"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/687617555cedfb74c9e3cb85d759b908dcb17856"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/6b47bdaacfd0045687880177e0987055d8f4765a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/73abbaf91aa33da87c008fb62c148ade561bb606"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7d871e969b941ce25653f7716203a0ea4d07ad4b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/98d93c226bdfaa79bbdd86981921d7f106374225"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/996d3da39899aceb8f4910911a3f19a45a7d9d1b"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cca81b4bc672604a84f6d224a55cc77ec7dee619"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f70d4aa88068096f35d73e3a05eff33c0a16b9cd"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-125", "CWE-476" ],
    "severity" : "HIGH",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:23Z"
  }
}