CVE-2022-50347

Kernel crash via unchecked MMC host registration

Published Sep 16, 2025 · Updated Sep 16, 2025

NULL pointer dereference in affected Linux kernel rtsx_usb_sdmmc releases allows local users to crash the kernel during device removal. The driver ignores an mmc_add_host() failure after mmc_alloc_host(), leaks the allocated host, and later deletes a device that was never added. Exploitation requires low-privilege local access, an rtsx USB card-reader path, an mmc_add_host() error, and subsequent device removal; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.16%
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 affected Linux kernel rtsx_usb_sdmmc releases allows local users to crash the kernel during device removal. The driver ignores an mmc_add_host() failure after mmc_alloc_host(), leaks the allocated host, and later deletes a device that was never added. Exploitation requires low-privilege local access, an rtsx USB card-reader path, an mmc_add_host() error, and subsequent device removal; the bounded consequence is a kernel crash.

The record

CVE
CVE-2022-50347
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=3.16
  2. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <1491667d5450778a265eddddd294219acfd648cb
  3. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <7fa922c7a3dd623fd59f1af50e8896fd9ca7f654
  4. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <89303ddbb502c3bc8edbf864f9f85500c8fe07e9
  5. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <937112e991ed25d1727d878734adcbef3b900274
  6. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <a522e26a20a43dcfbef9ee9f71ed803290e852b0
  7. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <d7ad7278be401b09c9f9a9f522cf4c449c7fd489
  8. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <df683201c7ffbd21a806a7cad657b661c5ebfb6f
  9. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <e598c9683fe1cf97c2b11b800cc3cee072108220
  10. Affected versionversion=c7f6558d84afe60016b8103c0737df6e376a1c2d <fc38a5a10e9e5a75eb9189854abeb8405b214cc9

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.16; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <1491667d5450778a265eddddd294219acfd648cb; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <7fa922c7a3dd623fd59f1af50e8896fd9ca7f654; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <89303ddbb502c3bc8edbf864f9f85500c8fe07e9; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <937112e991ed25d1727d878734adcbef3b900274; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <a522e26a20a43dcfbef9ee9f71ed803290e852b0; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <d7ad7278be401b09c9f9a9f522cf4c449c7fd489; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <df683201c7ffbd21a806a7cad657b661c5ebfb6f; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <e598c9683fe1cf97c2b11b800cc3cee072108220; version=c7f6558d84afe60016b8103c0737df6e376a1c2d <fc38a5a10e9e5a75eb9189854abeb8405b214cc9

Published CVSS scores

5.5UbuntuCVSS: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
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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