CVE-2026-68404

Local system crash via autodisconnect work race

Published Aug 10, 2026 · Updated Aug 10, 2026

A race condition in Linux cfg80211 allows local users to crash the system by releasing an owning netlink socket during wireless-device teardown. The nl80211_netlink_notify() path can queue wdev->disconnect_wk after NETDEV_GOING_DOWN has cancelled it, while device unregistration does not drain work queued by an RCU reader. Low-privileged local access and an owned wireless connection are required; the publicly established consequence is a system crash.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

A race condition in Linux cfg80211 allows local users to crash the system by releasing an owning netlink socket during wireless-device teardown. The nl80211_netlink_notify() path can queue wdev->disconnect_wk after NETDEV_GOING_DOWN has cancelled it, while device unregistration does not drain work queued by an RCU reader. Low-privileged local access and an owned wireless connection are required; the publicly established consequence is a system crash.

The record

CVE
CVE-2026-68404
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-367, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.11
  2. Affected versionversion=bd2522b168847106c1885f0319a2833bdf88bf9a <0c2ed186bbe14304415476d6707b747dddcd8583
  3. Affected versionversion=bd2522b168847106c1885f0319a2833bdf88bf9a <6d6123fef5a4af175cc6b6b12a03dd0f3c240b79

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.11; version=bd2522b168847106c1885f0319a2833bdf88bf9a <0c2ed186bbe14304415476d6707b747dddcd8583; version=bd2522b168847106c1885f0319a2833bdf88bf9a <6d6123fef5a4af175cc6b6b12a03dd0f3c240b79

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-367Time-of-check Time-of-use (TOCTOU) Race Condition
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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

Technologies

Your stack

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Your stack

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