CVE-2022-50858

Kernel crash via ignored host-registration failure

Published Dec 30, 2025 · Updated Dec 30, 2025

Memory-management error in the Linux Alcor MMC driver allows local users to crash the kernel through a failed host registration. The driver ignores an error from mmc_add_host(), leaks the mmc_alloc_host() allocation, and later deletes a host that was never added. Reaching the error path requires local high-privileged access according to SUSE; the bounded consequence is a kernel crash, not data access or code execution.

CVSS severity4.4
Medium
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

Memory-management error in the Linux Alcor MMC driver allows local users to crash the kernel through a failed host registration. The driver ignores an error from mmc_add_host(), leaks the mmc_alloc_host() allocation, and later deletes a host that was never added. Reaching the error path requires local high-privileged access according to SUSE; the bounded consequence is a kernel crash, not data access or code execution.

The record

CVE
CVE-2022-50858
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 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=5.0
  2. Affected versionversion=c5413ad815a675b5c98a002353d8e96b44b164e9 <289c964fe182ce755044a6cd57698072e12ffa6f
  3. Affected versionversion=c5413ad815a675b5c98a002353d8e96b44b164e9 <29c5b4da41f35108136d843c7432885c78cf8272
  4. Affected versionversion=c5413ad815a675b5c98a002353d8e96b44b164e9 <48dc06333d75f41c2ce9ba954bc3231324b45914
  5. Affected versionversion=c5413ad815a675b5c98a002353d8e96b44b164e9 <4a6e5d0222804a3eaf2ea4cf893f412e7cf98cb2
  6. Affected versionversion=c5413ad815a675b5c98a002353d8e96b44b164e9 <60fafcf2fb7ee9a4125dc9a86eeb9d490acf23e2
  7. Affected versionversion=c5413ad815a675b5c98a002353d8e96b44b164e9 <e93d1468f429475a753d6baa79b853b7ee5ef8c0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.0; version=c5413ad815a675b5c98a002353d8e96b44b164e9 <289c964fe182ce755044a6cd57698072e12ffa6f; version=c5413ad815a675b5c98a002353d8e96b44b164e9 <29c5b4da41f35108136d843c7432885c78cf8272; version=c5413ad815a675b5c98a002353d8e96b44b164e9 <48dc06333d75f41c2ce9ba954bc3231324b45914; version=c5413ad815a675b5c98a002353d8e96b44b164e9 <4a6e5d0222804a3eaf2ea4cf893f412e7cf98cb2; version=c5413ad815a675b5c98a002353d8e96b44b164e9 <60fafcf2fb7ee9a4125dc9a86eeb9d490acf23e2; version=c5413ad815a675b5c98a002353d8e96b44b164e9 <e93d1468f429475a753d6baa79b853b7ee5ef8c0

Published CVSS scores

4.4SUSECVSS:3.1/AV:L/AC:L/PR:H/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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

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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