CVE-2026-64331: Software Security Vulnerability Vulnerability

MODERATE
Advisory Identifier: GHSA-x846-472j-jj99
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CVSS 5.5
CWE-476
Published
Advisory Summary

CVE-2026-64331 is a MODERATE (CVSS 5.5) security vulnerability vulnerability (CWE-476: NULL Pointer Dereference) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product dereferences a pointer that it expects to be valid but is null.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64331 at a Glance

CVE Identifier CVE-2026-64331
GHSA Identifier GHSA-x846-472j-jj99
Severity MODERATE
CVSS v3.1 Base Score 5.5
CWE Classification CWE-476: NULL Pointer Dereference
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 5.5

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:N/I:N/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 None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2026-64331

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-2026-64331, 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-476: NULL Pointer Dereference, where the product dereferences a pointer that it expects to be valid but is null. 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: usbip: vudc: fix NULL deref in vep_dequeue() vep_alloc_request() wasn't initializing vrequest->udc, so cancellations on the FunctionFS AIO path were arriving in vep_dequeue without a valid UDC reference. Since vrequest->udc is never actually properly used anywhere, we opt to remove it, and update vep_dequeue to obtain a reference to the udc with ep_to_vudc(), consistent with the other vep_ ops. AFAICT this bug has existed for ~10 years. Seems that nobody has really stressed the FunctionFS AIO path on usbip's vudc. I tested this fix in a QEMU aarch64 guest driving FunctionFS endpoints via AIO. Before the fix, running `usbip attach` from the host would cause the guest to oops with the following backtrace: Call trace: vep_dequeue+0x1c/0xe4 (P) usb_ep_dequeue+0x14/0x20 ffs_aio_cancel+0x24/0x34 __arm64_sys_io_cancel+0xb0/0x124 do_el0_svc+0x68/0x100 el0_svc+0x18/0x5c el0t_64_sync_handler+0x98/0xdc el0t_64_sync+0x154/0x158

References

NVD — CVE-2026-64331 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64331
git.kernel.org/stable/c/0025276175... WEB
https://git.kernel.org/stable/c/0025276175fbbe0dcbf3f84d090b0adee769e9d9
git.kernel.org/stable/c/0443e4416a... WEB
https://git.kernel.org/stable/c/0443e4416aa1ee97748d1ed904eaf3352c60045e
git.kernel.org/stable/c/1226293ec9... WEB
https://git.kernel.org/stable/c/1226293ec9bed3d4cc5b05eeeb811d315ca51652
git.kernel.org/stable/c/347b59e9f9... WEB
https://git.kernel.org/stable/c/347b59e9f96719d89b6ef555d02a18ada1a5846f
git.kernel.org/stable/c/3750f75f29... WEB
https://git.kernel.org/stable/c/3750f75f29f99c0223601e2ee73ad084adec47bd
git.kernel.org/stable/c/9858c91d9e... WEB
https://git.kernel.org/stable/c/9858c91d9ee6a13c45311569039413729fc9b757
git.kernel.org/stable/c/c5371e0b91... WEB
https://git.kernel.org/stable/c/c5371e0b91b24159a3ebaa61e70b0980bcf03c0a
git.kernel.org/stable/c/d0ebf9cc7c... WEB
https://git.kernel.org/stable/c/d0ebf9cc7c2ddf95a7cfc654b940bdacb7edde97

Frequently Asked Questions

What is CVE-2026-64331?
CVE-2026-64331 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-476: NULL Pointer Dereference.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-64331?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-64331?
CVE-2026-64331 has a CVSS v3.1 base score of 5.5 (MODERATE) with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2026-64331?
CVE-2026-64331 is classified under CWE-476: NULL Pointer Dereference (The product dereferences a pointer that it expects to be valid but is NULL.).
How can I check Maven dependencies for CVE-2026-64331?
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-x846-472j-jj99",
  "modified" : "2026-09-03T18:31:16Z",
  "published" : "2026-07-25T12:31:31Z",
  "aliases" : [ "CVE-2026-64331" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nusbip: vudc: fix NULL deref in vep_dequeue()\n\nvep_alloc_request() wasn't initializing vrequest->udc, so cancellations\non the FunctionFS AIO path were arriving in vep_dequeue without a valid\nUDC reference.\n\nSince vrequest->udc is never actually properly used anywhere, we opt to\nremove it, and update vep_dequeue to obtain a reference to the udc with\nep_to_vudc(), consistent with the other vep_ ops.\n\nAFAICT this bug has existed for ~10 years. Seems that nobody has really\nstressed the FunctionFS AIO path on usbip's vudc.\n\nI tested this fix in a QEMU aarch64 guest driving FunctionFS endpoints\nvia AIO. Before the fix, running `usbip attach` from the host would\ncause the guest to oops with the following backtrace:\n\nCall trace:\n vep_dequeue+0x1c/0xe4 (P)\n usb_ep_dequeue+0x14/0x20\n ffs_aio_cancel+0x24/0x34\n __arm64_sys_io_cancel+0xb0/0x124\n do_el0_svc+0x68/0x100\n el0_svc+0x18/0x5c\n el0t_64_sync_handler+0x98/0xdc\n el0t_64_sync+0x154/0x158",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-64331"
  }, {
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    "url" : "https://git.kernel.org/stable/c/0025276175fbbe0dcbf3f84d090b0adee769e9d9"
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    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/0443e4416aa1ee97748d1ed904eaf3352c60045e"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1226293ec9bed3d4cc5b05eeeb811d315ca51652"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/347b59e9f96719d89b6ef555d02a18ada1a5846f"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3750f75f29f99c0223601e2ee73ad084adec47bd"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9858c91d9ee6a13c45311569039413729fc9b757"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c5371e0b91b24159a3ebaa61e70b0980bcf03c0a"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d0ebf9cc7c2ddf95a7cfc654b940bdacb7edde97"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-476" ],
    "severity" : "MODERATE",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-25T10:17:14Z"
  }
}