CVE-2022-50251

Kernel crash via unchecked host-registration failure

Published Sep 15, 2025 · Updated Sep 15, 2025

Memory leak in the Linux kernel vub300 MMC driver allows local users to trigger a kernel crash during device removal. The probe path ignores mmc_add_host() failures, and a usb_control_msg() failure path omits mmc_free_host(), leaking the host and leaving removal to delete a device that was never added. Reachability requires the vub300 driver and a VUB300 device to hit either error path; the reported consequence is an availability-only 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

Memory leak in the Linux kernel vub300 MMC driver allows local users to trigger a kernel crash during device removal. The probe path ignores mmc_add_host() failures, and a usb_control_msg() failure path omits mmc_free_host(), leaking the host and leaving removal to delete a device that was never added. Reachability requires the vub300 driver and a VUB300 device to hit either error path; the reported consequence is an availability-only kernel crash.

The record

CVE
CVE-2022-50251
Published
Sep 15, 2025
Updated
Sep 15, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, 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=3.0
  2. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <0613ad2401f88bdeae5594c30afe318e93b14676
  3. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <2044b2ea77945f372ef161d1bbf814e471767ff2
  4. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <25f05d762ca5e1c685002a53dd44f68e78ca3feb
  5. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <3049a3b927a40d89d4582ff1033cd7953be773c7
  6. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <3b29f8769d32016b2d89183db4d80c7a71b7e35e
  7. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <41ed46bdbd2878cd6567abe0974a445f8b1b8ec8
  8. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <a46e681151bbdacdf6b89ee8c4e5bad0555142bb
  9. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <afc898019e7bf18c5eb7a0ac19852fcb1b341b3c
  10. Affected versionversion=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <c9e85979b59cb86f0a15defa8199d740e2b36b90

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.0; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <0613ad2401f88bdeae5594c30afe318e93b14676; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <2044b2ea77945f372ef161d1bbf814e471767ff2; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <25f05d762ca5e1c685002a53dd44f68e78ca3feb; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <3049a3b927a40d89d4582ff1033cd7953be773c7; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <3b29f8769d32016b2d89183db4d80c7a71b7e35e; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <41ed46bdbd2878cd6567abe0974a445f8b1b8ec8; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <a46e681151bbdacdf6b89ee8c4e5bad0555142bb; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <afc898019e7bf18c5eb7a0ac19852fcb1b341b3c; version=88095e7b473a3d9ec3b9c60429576e9cbd327c89 <c9e85979b59cb86f0a15defa8199d740e2b36b90

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 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

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

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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