CVE-2022-50670

Kernel crash via unchecked MMC host failure

Published Dec 9, 2025 · Updated May 11, 2026

Improper error handling in the Linux kernel OMAP MMC host driver allows local users to crash the kernel during device removal. The omap_hsmmc probe path ignores an mmc_add_host() failure, leaks the mmc_alloc_host() allocation, and later passes an unregistered device to mmc_remove_host(), causing a null-pointer dereference in device_del(). Reachability requires local access and an OMAP MMC device configuration in which host registration fails before the driver's remove path runs.

CVSS severity5.5
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

Improper error handling in the Linux kernel OMAP MMC host driver allows local users to crash the kernel during device removal. The omap_hsmmc probe path ignores an mmc_add_host() failure, leaks the mmc_alloc_host() allocation, and later passes an unregistered device to mmc_remove_host(), causing a null-pointer dereference in device_del(). Reachability requires local access and an OMAP MMC device configuration in which host registration fails before the driver's remove path runs.

The record

CVE
CVE-2022-50670
Published
Dec 9, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 9, 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=2.6.29
  2. Affected versionversion=a45c6cb816474cefe56059fce422a9bdcd77e0dc <4e1dc24bcfc8257f24c0663badec7e4f3ae80558
  3. Affected versionversion=a45c6cb816474cefe56059fce422a9bdcd77e0dc <62005dfcc396424db3337a1dc3ab49623537f5e5
  4. Affected versionversion=a45c6cb816474cefe56059fce422a9bdcd77e0dc <a525cad241c339ca00bf7ebf03c5180f2a9b767c
  5. Affected versionversion=a45c6cb816474cefe56059fce422a9bdcd77e0dc <a5f8a4583280a76e50329b910e91ef1dea1e6c79
  6. Affected versionversion=a45c6cb816474cefe56059fce422a9bdcd77e0dc <f153c9e15f8961bdf38707853e15b42ea7c691d9
  7. Affected versionversion=a45c6cb816474cefe56059fce422a9bdcd77e0dc <fb3d596267a98813a7a8206097d8d46c98505a0d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.29; version=a45c6cb816474cefe56059fce422a9bdcd77e0dc <4e1dc24bcfc8257f24c0663badec7e4f3ae80558; version=a45c6cb816474cefe56059fce422a9bdcd77e0dc <62005dfcc396424db3337a1dc3ab49623537f5e5; version=a45c6cb816474cefe56059fce422a9bdcd77e0dc <a525cad241c339ca00bf7ebf03c5180f2a9b767c; version=a45c6cb816474cefe56059fce422a9bdcd77e0dc <a5f8a4583280a76e50329b910e91ef1dea1e6c79; version=a45c6cb816474cefe56059fce422a9bdcd77e0dc <f153c9e15f8961bdf38707853e15b42ea7c691d9; version=a45c6cb816474cefe56059fce422a9bdcd77e0dc <fb3d596267a98813a7a8206097d8d46c98505a0d

Published CVSS scores

5.5SUSECVSS: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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