CVE-2022-50169

Kernel heap disclosure via partial debugfs write

Published Jun 18, 2025 · Updated May 11, 2026

Information disclosure in the wil6210 driver in Linux allows local users to expose kernel heap data through its WMI debugfs file. wil_write_file_wmi allocates an uninitialized buffer, then a nonzero file offset lets simple_write_to_buffer copy only a suffix before wmi_send transmits the full buffer. Reachability requires write access to debugfs, which is restricted to root by default, and an active wil6210 device; the leak is limited to stale heap bytes sent to that device.

CVSS severity7.1
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in the wil6210 driver in Linux allows local users to expose kernel heap data through its WMI debugfs file. wil_write_file_wmi allocates an uninitialized buffer, then a nonzero file offset lets simple_write_to_buffer copy only a suffix before wmi_send transmits the full buffer. Reachability requires write access to debugfs, which is restricted to root by default, and an active wil6210 device; the leak is limited to stale heap bytes sent to that device.

The record

CVE
CVE-2022-50169
Published
Jun 18, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-909
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=3.17
  2. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <05ceda14ef7c73104e709c414c3680d8a59f51d4
  3. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <074e865b37da55aa87baa16d68b96896f85f8adb
  4. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <4615458db7793fadc6d546ac3564b36819e77a22
  5. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <60c9983425167ec5073c628d83a6875760d18059
  6. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <67470920cd3f3cb38699b1ad23234f96bead4d21
  7. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <789edc1af9c1a2293956e8534bfef3d18d629de9
  8. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <7a4836560a6198d245d5732e26f94898b12eb760
  9. Affected versionversion=ff974e4083341383d3dd4079e52ed30f57f376f0 <c1216e699a1ce83ea005510844bd7508d34c6cef

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.17; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <05ceda14ef7c73104e709c414c3680d8a59f51d4; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <074e865b37da55aa87baa16d68b96896f85f8adb; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <4615458db7793fadc6d546ac3564b36819e77a22; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <60c9983425167ec5073c628d83a6875760d18059; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <67470920cd3f3cb38699b1ad23234f96bead4d21; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <789edc1af9c1a2293956e8534bfef3d18d629de9; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <7a4836560a6198d245d5732e26f94898b12eb760; version=ff974e4083341383d3dd4079e52ed30f57f376f0 <c1216e699a1ce83ea005510844bd7508d34c6cef

Published CVSS scores

7.1NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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-909Missing Initialization of Resource

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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