CVE-2022-50178

Kernel crash via unguarded DPK result division

Published Jun 18, 2025 · Updated May 11, 2026

Division by zero in the rtw89 8852A Wi-Fi driver in Linux 5.16 allows local users to crash the kernel during station setup. The DPK result-reporting path uses a negative calibration result as a divisor, allowing the computed divisor to become zero instead of guarding the division. Reaching the fault requires local low-privileged initiation of Wi-Fi authentication on a system using the affected Realtek 8852A driver, and the result is a kernel core dump and service interruption.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Division by zero in the rtw89 8852A Wi-Fi driver in Linux 5.16 allows local users to crash the kernel during station setup. The DPK result-reporting path uses a negative calibration result as a divisor, allowing the computed divisor to become zero instead of guarding the division. Reaching the fault requires local low-privileged initiation of Wi-Fi authentication on a system using the affected Realtek 8852A driver, and the result is a kernel core dump and service interruption.

The record

CVE
CVE-2022-50178
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=5.16
  2. Affected versionversion=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <065e83ac83c0c0e615b96947145c85c4bd76c09a
  3. Affected versionversion=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <5abc81a138f873ab55223ec674afc3a3f945d60f
  4. Affected versionversion=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <683a4647a7a3044868cfdc14c117525091b9fa0c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.16; version=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <065e83ac83c0c0e615b96947145c85c4bd76c09a; version=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <5abc81a138f873ab55223ec674afc3a3f945d60f; version=e3ec7017f6a20d12ddd9fe23d345ebb7b8c104dd <683a4647a7a3044868cfdc14c117525091b9fa0c

Published CVSS scores

5.5CanonicalCVSS: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

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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