CVE-2022-50769

Kernel crash via unchecked host registration failure

Published Dec 24, 2025 · Updated Dec 24, 2025

Resource-management error in affected Linux kernel releases allows local users to crash the kernel when a failed mxcmmc host is removed. The mxcmmc probe path ignores an error from mmc_add_host(), leaking the mmc_alloc_host() allocation and leaving an unregistered host for the remove path to delete. Reachability requires the mxcmmc driver, a failed host-registration call, and subsequent device removal; the documented consequence is a service-interrupting kernel crash.

CVSS severity5.5
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-management error in affected Linux kernel releases allows local users to crash the kernel when a failed mxcmmc host is removed. The mxcmmc probe path ignores an error from mmc_add_host(), leaking the mmc_alloc_host() allocation and leaving an unregistered host for the remove path to delete. Reachability requires the mxcmmc driver, a failed host-registration call, and subsequent device removal; the documented consequence is a service-interrupting kernel crash.

The record

CVE
CVE-2022-50769
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=2.6.29
  2. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <1cf0c1e58738b97e2de207846105b6a5d46622ee
  3. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <2d496050ded83b13b16f05e1fc0329b0210d2493
  4. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <32eb502c972dfc34413c9147418b3d94d870c2b8
  5. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <3904eb97bb78fdca3e16d30a38ce5697b9686110
  6. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <5f35c038c9f4d258b3cf77885a2730f1417d63e7
  7. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <b8bdb3fd13d5cd1e86d22fd3f803a742fd88af89
  8. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <cde600af7b413c9fe03e85c58c4279df90e91d13
  9. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <d2ead18bc7cc166220cab5a744a05c5b69431a12
  10. Affected versionversion=d96be879ff469759af6d7fcebdb66237c18da6f8 <d37474ab9a79149075f0823315c6d45dd983a78c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <1cf0c1e58738b97e2de207846105b6a5d46622ee; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <2d496050ded83b13b16f05e1fc0329b0210d2493; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <32eb502c972dfc34413c9147418b3d94d870c2b8; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <3904eb97bb78fdca3e16d30a38ce5697b9686110; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <5f35c038c9f4d258b3cf77885a2730f1417d63e7; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <b8bdb3fd13d5cd1e86d22fd3f803a742fd88af89; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <cde600af7b413c9fe03e85c58c4279df90e91d13; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <d2ead18bc7cc166220cab5a744a05c5b69431a12; version=d96be879ff469759af6d7fcebdb66237c18da6f8 <d37474ab9a79149075f0823315c6d45dd983a78c

Published CVSS scores

5.5Amazon LinuxCVSS: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

T1499.004Application or System Exploitation

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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