CVE-2026-98420: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-h7rp-r63v-fmfm
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Advisory Summary

CVE-2026-98420 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-2026-98420 at a Glance

CVE Identifier CVE-2026-98420
GHSA Identifier GHSA-h7rp-r63v-fmfm
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-2026-98420

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-2026-98420, 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: ksmbd: follow SMB2 session expiration semantics ksmbd_session_register() destroys valid sessions after ten seconds of inactivity whenever a client starts another SessionSetup exchange. This confuses Session.IdleTime with Session.ExpirationTime. Windows can create additional authenticated sessions on an existing connection, so deleting the older session invalidates its tree connects and makes mapped drives fail with STATUS_NETWORK_NAME_DELETED. The session expiration rules require the server to change a valid session to expired only after its credential expiration time passes. A valid or expired session otherwise keeps its connection from being scavenged. Connections that have not negotiated a dialect, have no sessions, or have only InProgress sessions are disconnected after an implementation-specific timeout. Use the Windows-compatible 45 second value and run the expiration check periodically for both TCP and SMB Direct. Keep zero as an infinite credential expiration time, and count each Valid-to-Expired transition. Set expired sessions to InProgress when they reauthenticate. If authentication fails, remove the session from the global and per-connection tables immediately, including SMB3 multichannel connections. Retain protection against abandoned SessionId-zero exchanges by allowing only one InProgress authentication per connection. Additional exchanges fail with STATUS_INSUFFICIENT_RESOURCES, and stale InProgress sessions are reaped after the same 45 second setup timeout. This bounds the original unauthenticated memory-exhaustion path without evicting established sessions.

References

NVD — CVE-2026-98420 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98420
git.kernel.org/stable/c/c99ea78551... WEB
https://git.kernel.org/stable/c/c99ea7855124ca1428a1e59c2b4590aaef34eacf
git.kernel.org/stable/c/d7fd1f9860... WEB
https://git.kernel.org/stable/c/d7fd1f98607f2cd358e583f9548bdf0173090a86

Frequently Asked Questions

What is CVE-2026-98420?
CVE-2026-98420 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-2026-98420?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98420?
CVE-2026-98420 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98420?
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-h7rp-r63v-fmfm",
  "modified" : "2026-10-14T15:32:21Z",
  "published" : "2026-10-14T15:32:21Z",
  "aliases" : [ "CVE-2026-98420" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: follow SMB2 session expiration semantics\n\nksmbd_session_register() destroys valid sessions after ten seconds of\ninactivity whenever a client starts another SessionSetup exchange. This\nconfuses Session.IdleTime with Session.ExpirationTime. Windows can create\nadditional authenticated sessions on an existing connection, so deleting\nthe older session invalidates its tree connects and makes mapped drives\nfail with STATUS_NETWORK_NAME_DELETED.\n\nThe session expiration rules require the server to change a valid session\nto expired only after its credential expiration time passes. A valid or\nexpired session otherwise keeps its connection from being scavenged.\nConnections that have not negotiated a dialect, have no sessions, or have\nonly InProgress sessions are disconnected after an implementation-specific\ntimeout. Use the Windows-compatible 45 second value and run the expiration\ncheck periodically for both TCP and SMB Direct.\n\nKeep zero as an infinite credential expiration time, and count each\nValid-to-Expired transition. Set expired sessions to InProgress when they\nreauthenticate. If authentication fails, remove the session from the\nglobal and per-connection tables immediately, including SMB3 multichannel\nconnections.\n\nRetain protection against abandoned SessionId-zero exchanges by allowing\nonly one InProgress authentication per connection. Additional exchanges\nfail with STATUS_INSUFFICIENT_RESOURCES, and stale InProgress sessions are\nreaped after the same 45 second setup timeout. This bounds the original\nunauthenticated memory-exhaustion path without evicting established\nsessions.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98420"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/c99ea7855124ca1428a1e59c2b4590aaef34eacf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/d7fd1f98607f2cd358e583f9548bdf0173090a86"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-14T14:17:53Z"
  }
}