CVE-2022-50382

Kernel hang via reentrant padata reorder lock

Published Sep 18, 2025 · Updated Sep 18, 2025

Improper locking in Linux kernel 5.8 through 6.1.1 allows local users to hang the kernel through parallel crypto processing. The current-task path in padata_do_parallel calls the parallel callback without disabling bottom halves, so an interrupt can reenter padata_do_serial and spin on reorder->lock while the interrupted path holds that lock. Reaching the flaw requires local low-privilege access and an overloaded system that runs the callback in the current-task context; the bounded consequence is a kernel hang.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in Linux kernel 5.8 through 6.1.1 allows local users to hang the kernel through parallel crypto processing. The current-task path in padata_do_parallel calls the parallel callback without disabling bottom halves, so an interrupt can reenter padata_do_serial and spin on reorder->lock while the interrupted path holds that lock. Reaching the flaw requires local low-privilege access and an overloaded system that runs the callback in the current-task context; the bounded consequence is a kernel hang.

The record

CVE
CVE-2022-50382
Published
Sep 18, 2025
Updated
Sep 18, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 18, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2025Record 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=4611ce22468895acd61fee9ac1da810d60617d9a <17afa98bccec4f52203508b3f49b5f948c6fd6ac
  2. Affected versionversion=4611ce22468895acd61fee9ac1da810d60617d9a <34c3a47d20ae55b3600fed733bf96eafe9c500d5
  3. Affected versionversion=4611ce22468895acd61fee9ac1da810d60617d9a <6cfa9e60c0f88fdec6368e081ab968411cc706b1
  4. Affected versionversion=4611ce22468895acd61fee9ac1da810d60617d9a <7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d
  5. Affected versionversion=4611ce22468895acd61fee9ac1da810d60617d9a <8e0681dd4eee029eb1d533d06993f7cb091efb73
  6. Affected versionversion=5.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4611ce22468895acd61fee9ac1da810d60617d9a <17afa98bccec4f52203508b3f49b5f948c6fd6ac; version=4611ce22468895acd61fee9ac1da810d60617d9a <34c3a47d20ae55b3600fed733bf96eafe9c500d5; version=4611ce22468895acd61fee9ac1da810d60617d9a <6cfa9e60c0f88fdec6368e081ab968411cc706b1; version=4611ce22468895acd61fee9ac1da810d60617d9a <7337adb20fcc0aebb50eaff2bc5a8dd9a7c6743d; version=4611ce22468895acd61fee9ac1da810d60617d9a <8e0681dd4eee029eb1d533d06993f7cb091efb73; version=5.8

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS: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.

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

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

CWE-667Improper Locking
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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