CVE-2022-50846

Kernel crash via ignored host-registration failure

Published Dec 30, 2025 · Updated Dec 30, 2025

Denial of service in the VIA SD/MMC host driver in Linux allows attackers to crash the kernel during removal after host setup fails. The via_sd_probe() path ignores an mmc_add_host() error, retains the mmc_alloc_host() allocation, and later calls mmc_remove_host() for a host never added. Reaching the crash requires the VIA controller's host-registration failure followed by device removal; no network trigger is documented.

CVSS severityUnavailable
Unscored
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the VIA SD/MMC host driver in Linux allows attackers to crash the kernel during removal after host setup fails. The via_sd_probe() path ignores an mmc_add_host() error, retains the mmc_alloc_host() allocation, and later calls mmc_remove_host() for a host never added. Reaching the crash requires the VIA controller's host-registration failure followed by device removal; no network trigger is documented.

The record

CVE
CVE-2022-50846
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

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=2.6.31
  2. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <076bcd2c93e16b05c10564e299d6e5d26a766d00
  3. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <0959cc1685eb19774300d43ef25e318b457b156b
  4. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <0ec94795114edc7e24ec71849dce42bfa61dafa3
  5. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <12b8e81b77c05c658efd9cde3585bbd65ae39b59
  6. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <63400da6cd37a9793c19bb6aed7131b58b975a04
  7. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <95025a8dd0ec015872f6c16473fe04d6264e68ca
  8. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <ba91b413983a9235792523c6b9f7ba2586c4d75d
  9. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <e4e46fb61e3bb4628170810d3f2b996b709b90d9
  10. Affected versionversion=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <f59ef2a47a228e51322ad76752a55a8917c56e38

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.31; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <076bcd2c93e16b05c10564e299d6e5d26a766d00; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <0959cc1685eb19774300d43ef25e318b457b156b; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <0ec94795114edc7e24ec71849dce42bfa61dafa3; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <12b8e81b77c05c658efd9cde3585bbd65ae39b59; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <63400da6cd37a9793c19bb6aed7131b58b975a04; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <95025a8dd0ec015872f6c16473fe04d6264e68ca; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <ba91b413983a9235792523c6b9f7ba2586c4d75d; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <e4e46fb61e3bb4628170810d3f2b996b709b90d9; version=f0bf7f61b8405224bc52fc9a3ccd167a68126e00 <f59ef2a47a228e51322ad76752a55a8917c56e38

Published CVSS scores

No CVSS assessment is available in this record.

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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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