CVE-2026-80996: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-hc5w-42jx-9cr6
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Advisory Summary

CVE-2026-80996 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-2026-80996 at a Glance

CVE Identifier CVE-2026-80996
GHSA Identifier GHSA-hc5w-42jx-9cr6
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-2026-80996

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-2026-80996, 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: l2tp: do not propagate multicast notification errors The tunnel create, tunnel modify, session create, and session modify netlink handlers send multicast notifications through helpers that can fail while allocating or encoding a message, or while multicasting it. For tunnel and session create/modify, a notification is sent after the live operation has completed. Returning a best-effort notification error as the command result can therefore report failure for an operation that already committed and can cause callers to retry and accumulate live objects. Keep sending notifications for listener visibility, but do not propagate their best-effort status as the command result. This also keeps the tunnel modify command consistent with the other notification-only paths.

References

NVD — CVE-2026-80996 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80996
git.kernel.org/stable/c/0fe037d5ea... WEB
https://git.kernel.org/stable/c/0fe037d5eaad938aa3e9143ee071aa237750b42b
git.kernel.org/stable/c/50c4038f16... WEB
https://git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481
git.kernel.org/stable/c/9c340473f4... WEB
https://git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1
git.kernel.org/stable/c/af20e269f7... WEB
https://git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865

Frequently Asked Questions

What is CVE-2026-80996?
CVE-2026-80996 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-2026-80996?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-80996?
CVE-2026-80996 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-80996?
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-hc5w-42jx-9cr6",
  "modified" : "2026-09-11T21:31:23Z",
  "published" : "2026-09-11T21:31:23Z",
  "aliases" : [ "CVE-2026-80996" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: l2tp: do not propagate multicast notification errors\n\nThe tunnel create, tunnel modify, session create, and session modify\nnetlink handlers send multicast notifications through helpers that can fail\nwhile allocating or encoding a message, or while multicasting it.\n\nFor tunnel and session create/modify, a notification is sent after the live\noperation has completed. Returning a best-effort notification error as the\ncommand result can therefore report failure for an operation that already\ncommitted and can cause callers to retry and accumulate live objects.\n\nKeep sending notifications for listener visibility, but do not propagate\ntheir best-effort status as the command result. This also keeps the tunnel\nmodify command consistent with the other notification-only paths.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-80996"
  }, {
    "type" : "WEB",
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  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/50c4038f1670bf9a80c6a58ae83d1602decd8481"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/9c340473f4822bb31b151c19afd17448eda5acd1"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/af20e269f7459d2ce69887fdf2fad7caf986c865"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-09-11T20:19:06Z"
  }
}