CVE-2022-50100

Task-scheduling disruption via disallowed-CPU requeue

Published Jun 18, 2025 · Updated May 11, 2026

Race condition in affected Linux kernel 5.x releases allows local users to disrupt task scheduling via a parallel wakeup. The scheduler wakeup path reads task_cpu(p) while a task is descheduling and requeues it without confirming that cpus_mask still permits the old CPU. Reachability depends on winning the migration race, observed with a workqueue rescue thread on a large machine; the bounded result is an incorrect CPU queue and kernel warning.

CVSS severity5.5
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in affected Linux kernel 5.x releases allows local users to disrupt task scheduling via a parallel wakeup. The scheduler wakeup path reads task_cpu(p) while a task is descheduling and requeues it without confirming that cpus_mask still permits the old CPU. Reachability depends on winning the migration race, observed with a workqueue rescue thread on a large machine; the bounded result is an incorrect CPU queue and kernel warning.

The record

CVE
CVE-2022-50100
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 18, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=5.8
  2. Affected versionversion=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <302f7b0fc337746f41c69eb08522907f6a90c643
  3. Affected versionversion=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <748d2e9585ae53cb6be48e84f93d2f082ae1d135
  4. Affected versionversion=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <751d4cbc43879229dbc124afefe240b70fd29a85
  5. Affected versionversion=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <fde45283f4c8a91c367ea5f20f87036468755121

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <302f7b0fc337746f41c69eb08522907f6a90c643; version=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <748d2e9585ae53cb6be48e84f93d2f082ae1d135; version=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <751d4cbc43879229dbc124afefe240b70fd29a85; version=c6e7bd7afaeb3af55ffac122828035f1c01d1d7b <fde45283f4c8a91c367ea5f20f87036468755121

Published CVSS scores

5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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