CVE-2026-98421Public exploit

Kernel warning via missing TDLS peer validation

Published Oct 14, 2026 · Updated Oct 14, 2026

Missing peer validation in Linux kernel mac80211 allows local users to trigger a kernel warning via TDLS setup-confirm requests. The ieee80211_tdls_mgmt function builds a setup-confirm frame without first checking that the destination exists as a TDLS station. Reachability requires access to the local TDLS management path; published evidence demonstrates a warning, not a kernel crash or remote compromise.

CVSS severityUnavailable
Unscored
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

Missing peer validation in Linux kernel mac80211 allows local users to trigger a kernel warning via TDLS setup-confirm requests. The ieee80211_tdls_mgmt function builds a setup-confirm frame without first checking that the destination exists as a TDLS station. Reachability requires access to the local TDLS management path; published evidence demonstrates a warning, not a kernel crash or remote compromise.

The record

CVE
CVE-2026-98421
Published
Oct 14, 2026
Updated
Oct 14, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Oct 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started