CVE-2022-50767

Kernel memory corruption via physical USB removal

Published Dec 24, 2025 · Updated Dec 24, 2025

Use-after-free in Linux smscufx before 6.1 allows physically proximate attackers to corrupt kernel memory by removing a USB device. The driver's framebuffer teardown lacks a .fb_destroy callback that releases the final ufx reference, so USB-managed state can be freed while framebuffer users still retain it. Exploitation requires physical access to remove an attached device using the smscufx driver; the public record does not establish code execution or data disclosure.

CVSS severity5.1
Medium
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux smscufx before 6.1 allows physically proximate attackers to corrupt kernel memory by removing a USB device. The driver's framebuffer teardown lacks a .fb_destroy callback that releases the final ufx reference, so USB-managed state can be freed while framebuffer users still retain it. Exploitation requires physical access to remove an attached device using the smscufx driver; the public record does not establish code execution or data disclosure.

The record

CVE
CVE-2022-50767
Published
Dec 24, 2025
Updated
Dec 24, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
physical
Privileges
Unavailable

Timeline

How it unfolded

  1. Dec 24, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 24, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f40852d671072836fb7ae331a1f28a24223c4e8
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5385af2f89bc352fb70753ab41b2bb036190141f
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953f
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <70faf9d9b6cc74418716bbf76fe75bd2da10ad4a
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d924b262f3178a9b17c17d4306a9f426c508bd9
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cc67482c9e5f2c80d62f623bcc347c29f9f648e1
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cc6a7249842fceda7574ceb63275a2d5e99d2862
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d9ddfeb01fb95ffbbc7031d46a5ee2a5e45cbb86

What conditions does exploitation require?

Attack vectorphysical
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3f40852d671072836fb7ae331a1f28a24223c4e8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5385af2f89bc352fb70753ab41b2bb036190141f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <6f2075ea883e5d7730d0c9ebb1bb8e7a1a7e953f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <70faf9d9b6cc74418716bbf76fe75bd2da10ad4a; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8d924b262f3178a9b17c17d4306a9f426c508bd9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cc67482c9e5f2c80d62f623bcc347c29f9f648e1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cc6a7249842fceda7574ceb63275a2d5e99d2862; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d9ddfeb01fb95ffbbc7031d46a5ee2a5e45cbb86

Published CVSS scores

5.1SUSECVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/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)
Vectorphysical
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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