CVE-2026-64514: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-r2gx-xm5r-33f5
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Advisory Summary

CVE-2026-64514 is a security vulnerability vulnerability (General Security Weakness) affecting Software libraries in the Maven ecosystem. Remediation is available in the latest vendor maintenance releases.

CVE-2026-64514 at a Glance

CVE Identifier CVE-2026-64514
GHSA Identifier GHSA-r2gx-xm5r-33f5
Severity N/A
CVSS v3.1 Base Score N/A
CWE Classification General Security Weakness
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

How to Fix CVE-2026-64514

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-2026-64514, 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: userfaultfd: gate must_wait writability check on pte_present() userfaultfd_must_wait() and userfaultfd_huge_must_wait() read the PTE without taking the page table lock and then apply pte_write() / huge_pte_write() to it. Those accessors decode bits from the present encoding only; on a swap or migration entry they read the offset bits that happen to share the same position and return an undefined result. The intent of the check is "is this fault still WP-blocked?". A non-marker swap entry means the page is in transit -- the userfault context the original fault delivered against is no longer the same, and the swap-in or migration completion path will re-deliver a fresh fault if userspace still needs to handle it. Worst case under the current code the garbage write bit says "wait", and the thread stays asleep until a UFFDIO_WAKE that may never arrive. Gate the writability check on pte_present() so the lockless re-check only inspects present-PTE bits when the entry is actually present. The non-present, non-marker case returns "don't wait" and lets the fault path retry.

References

NVD — CVE-2026-64514 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-64514
git.kernel.org/stable/c/29e6f952c5... WEB
https://git.kernel.org/stable/c/29e6f952c5fb7dc1d6b90fe5b7f36063d44ddae0
git.kernel.org/stable/c/5f4dbdb0a8... WEB
https://git.kernel.org/stable/c/5f4dbdb0a87596214076b20b94f2b71b522170b3
git.kernel.org/stable/c/60d696a037... WEB
https://git.kernel.org/stable/c/60d696a037eeeedfb57756dfe7ec08a1587c8631
git.kernel.org/stable/c/7101838881... WEB
https://git.kernel.org/stable/c/710183888174639a15fcec16cd1af766b8480bb7
git.kernel.org/stable/c/8e80af52db... WEB
https://git.kernel.org/stable/c/8e80af52db652fbc41320eee45a4f73bc029faf2
git.kernel.org/stable/c/a5700a4c1c... WEB
https://git.kernel.org/stable/c/a5700a4c1c9099ac2ac73fe8a09cf059972e0d2f
git.kernel.org/stable/c/a6e9a4939e... WEB
https://git.kernel.org/stable/c/a6e9a4939e359599701b1da351e84f72e021443a
git.kernel.org/stable/c/d4026417e8... WEB
https://git.kernel.org/stable/c/d4026417e8184d13850a0bad4d96ceb6ed9f7152

Frequently Asked Questions

What is CVE-2026-64514?
CVE-2026-64514 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-2026-64514?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-64514?
CVE-2026-64514 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-64514?
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 
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  "id" : "GHSA-r2gx-xm5r-33f5",
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  "published" : "2026-07-25T12:31:38Z",
  "aliases" : [ "CVE-2026-64514" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nuserfaultfd: gate must_wait writability check on pte_present()\n\nuserfaultfd_must_wait() and userfaultfd_huge_must_wait() read the PTE\nwithout taking the page table lock and then apply pte_write() /\nhuge_pte_write() to it.  Those accessors decode bits from the present\nencoding only; on a swap or migration entry they read the offset bits that\nhappen to share the same position and return an undefined result.\n\nThe intent of the check is \"is this fault still WP-blocked?\".  A\nnon-marker swap entry means the page is in transit -- the userfault\ncontext the original fault delivered against is no longer the same, and\nthe swap-in or migration completion path will re-deliver a fresh fault if\nuserspace still needs to handle it.  Worst case under the current code the\ngarbage write bit says \"wait\", and the thread stays asleep until a\nUFFDIO_WAKE that may never arrive.\n\nGate the writability check on pte_present() so the lockless re-check only\ninspects present-PTE bits when the entry is actually present.  The\nnon-present, non-marker case returns \"don't wait\" and lets the fault path\nretry.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
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  "database_specific" : {
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    "severity" : null,
    "github_reviewed" : false,
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    "nvd_published_at" : "2026-07-25T10:17:37Z"
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}