CVE-2026-63907: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-g9q5-69g8-2q3f
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Advisory Summary

CVE-2026-63907 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-2026-63907 at a Glance

CVE Identifier CVE-2026-63907
GHSA Identifier GHSA-g9q5-69g8-2q3f
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-2026-63907

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-2026-63907, 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: uio: uio_pci_generic_sva: fix double free of devm_kzalloc() memory uio_pci_sva allocates struct uio_pci_sva_dev with devm_kzalloc() in probe(), but then calls kfree(udev) both on the probe() error path (label out_free) and again in remove(). Because devm_kzalloc() allocations are devres-managed and are freed automatically when the device is detached (including after a failing probe() and during driver unbind), the explicit kfree() can lead to a double free. If probe() fails after devm_kzalloc(), the error path frees udev and devres cleanup will free it again when the core unwinds the partially bound device. On normal driver removal, remove() frees udev and devres will free it again when the device is detached. This issue was identified by a static analysis tool I developed and confirmed by manual review. Fix by removing the manual kfree() calls and dropping the now-unused label.

References

NVD — CVE-2026-63907 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63907
git.kernel.org/stable/c/e344865bfc... WEB
https://git.kernel.org/stable/c/e344865bfca4eb37ed8d7ac5917226e49fcec7ce
git.kernel.org/stable/c/f74c8696f1... WEB
https://git.kernel.org/stable/c/f74c8696f14149d5e43cc28b015326a759c48f00

Frequently Asked Questions

What is CVE-2026-63907?
CVE-2026-63907 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-2026-63907?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63907?
CVE-2026-63907 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63907?
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-g9q5-69g8-2q3f",
  "modified" : "2026-07-19T18:31:45Z",
  "published" : "2026-07-19T18:31:45Z",
  "aliases" : [ "CVE-2026-63907" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nuio: uio_pci_generic_sva: fix double free of devm_kzalloc() memory\n\nuio_pci_sva allocates struct uio_pci_sva_dev with devm_kzalloc() in\nprobe(), but then calls kfree(udev) both on the probe() error path\n(label out_free) and again in remove().\n\nBecause devm_kzalloc() allocations are devres-managed and are freed\nautomatically when the device is detached (including after a failing\nprobe() and during driver unbind), the explicit kfree() can lead to a\ndouble free.\n\nIf probe() fails after devm_kzalloc(), the error path frees udev and\ndevres cleanup will free it again when the core unwinds the partially\nbound device. On normal driver removal, remove() frees udev and devres\nwill free it again when the device is detached.\n\nThis issue was identified by a static analysis tool I developed and\nconfirmed by manual review. Fix by removing the manual kfree() calls\nand dropping the now-unused label.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63907"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/e344865bfca4eb37ed8d7ac5917226e49fcec7ce"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/f74c8696f14149d5e43cc28b015326a759c48f00"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:08Z"
  }
}