CVE-2022-49874

Service interruption via leaked Hyper-V HID device

Published May 1, 2025 · Updated May 11, 2026

Memory leak in Linux 3.3 through 6.1-rc4 allows local users to interrupt service through failed Hyper-V mouse device registration. In mousevsc_probe(), the error path after hid_add_device() fails omits hid_destroy_device(), leaving the hid_dev allocation unreleased. Reachability requires the Hyper-V HID driver and a device-registration failure; the bounded consequence is retained kernel memory and eventual service interruption.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in Linux 3.3 through 6.1-rc4 allows local users to interrupt service through failed Hyper-V mouse device registration. In mousevsc_probe(), the error path after hid_add_device() fails omits hid_destroy_device(), leaving the hid_dev allocation unreleased. Reachability requires the Hyper-V HID driver and a device-registration failure; the bounded consequence is retained kernel memory and eventual service interruption.

The record

CVE
CVE-2022-49874
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 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=3.3
  2. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <249b743801c00542e9324f87b380032e957a43e8
  3. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <5ad95d71344b7ffec360d62591633b3c465dc049
  4. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <5f3aba6566b866f5b0a4916f0b2e8a6ae66a6451
  5. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <8597b59e3d22b27849bd3e4f92a3d466774bfb04
  6. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <a6d2fb1874c52ace1f5cf1966ee558829c5c19b6
  7. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <b5bcb94b0954a026bbd671741fdb00e7141f9c91
  8. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <e29289d0d8193fca6d2c1f0a1de75cfc80edec00
  9. Affected versionversion=74c4fb058083b47571a4f76dcfce95085f2d8098 <ed75d1a1c31a0cae8ecc8bcea710b25c0be68da0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.3; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <249b743801c00542e9324f87b380032e957a43e8; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <5ad95d71344b7ffec360d62591633b3c465dc049; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <5f3aba6566b866f5b0a4916f0b2e8a6ae66a6451; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <8597b59e3d22b27849bd3e4f92a3d466774bfb04; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <a6d2fb1874c52ace1f5cf1966ee558829c5c19b6; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <b5bcb94b0954a026bbd671741fdb00e7141f9c91; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <e29289d0d8193fca6d2c1f0a1de75cfc80edec00; version=74c4fb058083b47571a4f76dcfce95085f2d8098 <ed75d1a1c31a0cae8ecc8bcea710b25c0be68da0

Published CVSS scores

5.5NIST NVDCVSS: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.

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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

CWE-401Missing Release of Memory after Effective Lifetime
T1499.004Application 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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