CVE-2026-63983: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-rj36-qxvm-r8rm
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Advisory Summary

CVE-2026-63983 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-2026-63983 at a Glance

CVE Identifier CVE-2026-63983
GHSA Identifier GHSA-rj36-qxvm-r8rm
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-2026-63983

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-2026-63983, 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: net/sched: fix packet loop on netem when duplicate is on When netem duplicates a packet it re-enqueues the copy at the root qdisc. If another netem sits in the tree the copy can be duplicated again, recursing until the stack or memory is exhausted. The original duplication guard temporarily zeroed q->duplicate around the re-enqueue, but that does not cover all cases because it is per-qdisc state shared across all concurrent enqueue paths and is not safe without additional locking. Use the skb tc_depth field introduced in an earlier patch: - increment it on the duplicate before re-enqueue - skip duplication for any skb whose tc_depth is already non-zero. This marks the packet itself rather than mutating qdisc state, therefore it is safe regardless of tree topology or concurrency.

References

NVD — CVE-2026-63983 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-63983
git.kernel.org/stable/c/1a298a514c... WEB
https://git.kernel.org/stable/c/1a298a514ce766c6d0c232991a390fec67af81ad
git.kernel.org/stable/c/4ec3a8ca97... WEB
https://git.kernel.org/stable/c/4ec3a8ca97394f17e73a4d8d4c79c1c78b322772
git.kernel.org/stable/c/9552b11e3e... WEB
https://git.kernel.org/stable/c/9552b11e3edabc97cfcd9f29103d5afbce7ae183
git.kernel.org/stable/c/cfb2616042... WEB
https://git.kernel.org/stable/c/cfb2616042767ab31260d4f39190c381bec8b12e

Frequently Asked Questions

What is CVE-2026-63983?
CVE-2026-63983 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-2026-63983?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-63983?
CVE-2026-63983 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-63983?
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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  "schema_version" : "1.4.0",
  "id" : "GHSA-rj36-qxvm-r8rm",
  "modified" : "2026-10-15T12:30:38Z",
  "published" : "2026-07-19T18:31:48Z",
  "aliases" : [ "CVE-2026-63983" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix packet loop on netem when duplicate is on\n\nWhen netem duplicates a packet it re-enqueues the copy at the root qdisc.\nIf another netem sits in the tree the copy can be duplicated\nagain, recursing until the stack or memory is exhausted.\n\nThe original duplication guard temporarily zeroed q->duplicate around\nthe re-enqueue, but that does not cover all cases because it is\nper-qdisc state shared across all concurrent enqueue paths\nand is not safe without additional locking.\n\nUse the skb tc_depth field introduced in an earlier patch:\n - increment it on the duplicate before re-enqueue\n - skip duplication for any skb whose tc_depth is already non-zero.\n\nThis marks the packet itself rather than mutating qdisc state,\ntherefore it is safe regardless of tree topology or concurrency.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-63983"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/1a298a514ce766c6d0c232991a390fec67af81ad"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4ec3a8ca97394f17e73a4d8d4c79c1c78b322772"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9552b11e3edabc97cfcd9f29103d5afbce7ae183"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/cfb2616042767ab31260d4f39190c381bec8b12e"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-19T16:17:17Z"
  }
}