CVE-2022-50267

Kernel crash via unchecked MMC host failure

Published Sep 15, 2025 · Updated Sep 15, 2025

NULL pointer dereference in the rtsx_pci MMC host driver in Linux allows local users to crash the kernel during device removal. The probe path ignores an mmc_add_host() failure, leaks the mmc_alloc_host() allocation, and later deletes a host that was never added. Reachability requires an MMC host-registration failure followed by removal of the affected rtsx_pci device; the reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the rtsx_pci MMC host driver in Linux allows local users to crash the kernel during device removal. The probe path ignores an mmc_add_host() failure, leaks the mmc_alloc_host() allocation, and later deletes a host that was never added. Reachability requires an MMC host-registration failure followed by removal of the affected rtsx_pci device; the reported consequence is a kernel crash.

The record

CVE
CVE-2022-50267
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 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=3.8
  2. Affected versionversion=ff984e57d36e8ac468849a144a36f1c11f88b61c <0c87db77423a282b3b38b8a6daf057b822680516
  3. Affected versionversion=ff984e57d36e8ac468849a144a36f1c11f88b61c <30dc645461dfc63e52b3af8ee4a98e17bf14bacf
  4. Affected versionversion=ff984e57d36e8ac468849a144a36f1c11f88b61c <5cd4e04eccaec140da6fa04db056a76282ee6852
  5. Affected versionversion=ff984e57d36e8ac468849a144a36f1c11f88b61c <ffa9b2a79e3e959683efbad3f6db937eca9d38f5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.8; version=ff984e57d36e8ac468849a144a36f1c11f88b61c <0c87db77423a282b3b38b8a6daf057b822680516; version=ff984e57d36e8ac468849a144a36f1c11f88b61c <30dc645461dfc63e52b3af8ee4a98e17bf14bacf; version=ff984e57d36e8ac468849a144a36f1c11f88b61c <5cd4e04eccaec140da6fa04db056a76282ee6852; version=ff984e57d36e8ac468849a144a36f1c11f88b61c <ffa9b2a79e3e959683efbad3f6db937eca9d38f5

Published CVSS scores

5.5NIST NVDCVSS: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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

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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