CVE-2026-68094

Denial of service via stale runqueue tracking

Published Aug 10, 2026 · Updated Aug 10, 2026

Denial of service in Linux kernel 7.1 sched_ext allows attackers to trigger a kernel assertion during local DSQ dispatch. During a local DSQ move, dispatch_to_local_dsq() switches runqueue locks without updating the recorded runqueue, so a nested dequeue callback restores tracking for a lock no longer held. The affected path requires sched_ext dispatch to move a task locally and invoke ops.dequeue() synchronously; published sources establish no lower-privileged trigger.

CVSS severityUnavailable
Unscored
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

Denial of service in Linux kernel 7.1 sched_ext allows attackers to trigger a kernel assertion during local DSQ dispatch. During a local DSQ move, dispatch_to_local_dsq() switches runqueue locks without updating the recorded runqueue, so a nested dequeue callback restores tracking for a lock no longer held. The affected path requires sched_ext dispatch to move a task locally and invoke ops.dequeue() synchronously; published sources establish no lower-privileged trigger.

The record

CVE
CVE-2026-68094
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-367, T1499
Attack vector
Unavailable
Privileges
Unavailable

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=7.1
  2. Affected versionversion=7fb39e4eb4c3db52e4707a6a1cd45362f7e803f5 <18d62044cda7a2b40f59d910659c0b0d6accad37
  3. Affected versionversion=7fb39e4eb4c3db52e4707a6a1cd45362f7e803f5 <97c09c9f5739b8757ee29dabb0af30069137e286

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=7.1; version=7fb39e4eb4c3db52e4707a6a1cd45362f7e803f5 <18d62044cda7a2b40f59d910659c0b0d6accad37; version=7fb39e4eb4c3db52e4707a6a1cd45362f7e803f5 <97c09c9f5739b8757ee29dabb0af30069137e286

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.

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)
VectorUnavailable
PrivilegesUnavailable
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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