CVE-2026-98340: Software Security Vulnerability Vulnerability

UNKNOWN
Advisory Identifier: GHSA-84vw-9582-fhpx
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Advisory Summary

CVE-2026-98340 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-2026-98340 at a Glance

CVE Identifier CVE-2026-98340
GHSA Identifier GHSA-84vw-9582-fhpx
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-2026-98340

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-2026-98340, 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: wifi: cfg80211: only group hidden BSSes with beacon entries When a probe response for an unknown BSS comes in, __cfg80211_bss_update() looks for an existing entry with the same BSSID and a hidden (zero-length or NUL-filled) SSID, and if it finds one it groups them, using the beacon IEs from the existing entry. But that could find another entry without a beacon, if it was also from a probe response (with SSID), so there's a group without beacon elements. If a beacon with a hidden SSID for that BSSID arrives later, cfg80211_combine_bsses() goes looking for the probe response entries that belong to it - i.e. entries with the same BSSID and channel that have no beacon IEs - and finds those two. They are already grouped with each other, so it hits its WARN_ON_ONCE(bss->pub.hidden_beacon_bss) WARN_ON_ONCE(!list_empty(&bss->hidden_list)) which are there because an entry without beacon elements is not supposed to be part of a group yet. Only combine entries when a beacon was already received, ones that are kept separate will be combined when a beacon arrives.

References

NVD — CVE-2026-98340 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-98340
git.kernel.org/stable/c/068843ed09... WEB
https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065
git.kernel.org/stable/c/332ea1502c... WEB
https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41
git.kernel.org/stable/c/3658093df6... WEB
https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203
git.kernel.org/stable/c/4cd6a518ce... WEB
https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2
git.kernel.org/stable/c/73365b8163... WEB
https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac
git.kernel.org/stable/c/7405dd19bd... WEB
https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf
git.kernel.org/stable/c/74ed0d992f... WEB
https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034
git.kernel.org/stable/c/86235be788... WEB
https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49

Frequently Asked Questions

What is CVE-2026-98340?
CVE-2026-98340 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-2026-98340?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What CWE is associated with CVE-2026-98340?
CVE-2026-98340 is classified under General Security Weakness.
How can I check Maven dependencies for CVE-2026-98340?
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-84vw-9582-fhpx",
  "modified" : "2026-10-06T09:31:36Z",
  "published" : "2026-10-06T09:31:35Z",
  "aliases" : [ "CVE-2026-98340" ],
  "details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: only group hidden BSSes with beacon entries\n\nWhen a probe response for an unknown BSS comes in, __cfg80211_bss_update()\nlooks for an existing entry with the same BSSID and a hidden (zero-length\nor NUL-filled) SSID, and if it finds one it groups them, using the beacon\nIEs from the existing entry.\n\nBut that could find another entry without a beacon, if it was also from a\nprobe response (with SSID), so there's a group without beacon elements.\n\nIf a beacon with a hidden SSID for that BSSID arrives later,\ncfg80211_combine_bsses() goes looking for the probe response entries that\nbelong to it - i.e. entries with the same BSSID and channel that have no\nbeacon IEs - and finds those two. They are already grouped with each\nother, so it hits its\n\n  WARN_ON_ONCE(bss->pub.hidden_beacon_bss)\n  WARN_ON_ONCE(!list_empty(&bss->hidden_list))\n\nwhich are there because an entry without beacon elements is not supposed\nto be part of a group yet.\n\nOnly combine entries when a beacon was already received, ones that are\nkept separate will be combined when a beacon arrives.",
  "severity" : [ ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-98340"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034"
  }, {
    "type" : "WEB",
    "url" : "https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49"
  } ],
  "database_specific" : {
    "cwe_ids" : [ ],
    "severity" : null,
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-10-06T09:18:26Z"
  }
}