CVE-2022-50282

Service interruption via invalid cdev cleanup

Published Sep 15, 2025 · Updated Sep 15, 2025

Improper initialization in the Linux kernel allows local users to interrupt service during failed character-device registration. In cdev_device_add(), an error from device_add() reaches cdev_del() even when an unset dev->devt meant cdev_add() never initialized the character-device kobject. The path requires a device-registration failure and low local privileges; the public report reproduced it through fault injection and observed a kernel warning.

CVSS severity5.5
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper initialization in the Linux kernel allows local users to interrupt service during failed character-device registration. In cdev_device_add(), an error from device_add() reaches cdev_del() even when an unset dev->devt meant cdev_add() never initialized the character-device kobject. The path requires a device-registration failure and low local privileges; the public report reproduced it through fault injection and observed a kernel warning.

The record

CVE
CVE-2022-50282
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-908, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2025Record 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?

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

  1. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797
  2. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <28dc61cc49c6e995121c6d86bef4b73df78dda80
  3. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <34d17b39bceef25e4cf9805cd59250ae05d0a139
  4. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <6acf8597c5b04f455ee0649e11e5f3bcd28f381e
  5. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <85a5660491b507d33662b8e81c142e6041e642eb
  6. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <b5de1eac71fec1af7723f1083d23a24789fd795c
  7. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <c46db6088bccff5115674d583fef46ede80077a2
  8. Affected versionversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <d85b5247a79355b8432bfd9ac871f96117f750d4
  9. Affected versionversion=4.12
  10. Affected versionversion=d79d7d5c878809964da537336dad5ff55fa1605e
  11. Affected versionversion=da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d <5d2146889fad4cb9e6c13e790d4cfd871486eca8
  12. Affected versionversion=f78b54e7d83c7879f9a6e49e6724019ca34177cc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <28dc61cc49c6e995121c6d86bef4b73df78dda80; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <34d17b39bceef25e4cf9805cd59250ae05d0a139; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <6acf8597c5b04f455ee0649e11e5f3bcd28f381e; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <85a5660491b507d33662b8e81c142e6041e642eb; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <b5de1eac71fec1af7723f1083d23a24789fd795c; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <c46db6088bccff5115674d583fef46ede80077a2; version=233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 <d85b5247a79355b8432bfd9ac871f96117f750d4; version=4.12; version=d79d7d5c878809964da537336dad5ff55fa1605e; version=da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d <5d2146889fad4cb9e6c13e790d4cfd871486eca8; version=f78b54e7d83c7879f9a6e49e6724019ca34177cc

Published CVSS scores

5.5NVDCVSS: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 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-908Use of Uninitialized Resource
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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