CVE-2022-49151

Service interruption via unchecked USB endpoint types

Published Feb 26, 2025 · Updated May 11, 2026

Improper endpoint validation in the Linux mcba_usb driver allows local users to interrupt service through a crafted USB descriptor. The probe path assumes fixed bulk endpoints and submits URBs through pipes built for those endpoint numbers without checking the descriptors’ actual types. A local user must present a malformed USB interface during driver probing, which triggers a usb_submit_urb warning and disrupts kernel availability.

CVSS severity5.5
Medium
EPSS probability0.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper endpoint validation in the Linux mcba_usb driver allows local users to interrupt service through a crafted USB descriptor. The probe path assumes fixed bulk endpoints and submits URBs through pipes built for those endpoint numbers without checking the descriptors’ actual types. A local user must present a malformed USB interface during driver probing, which triggers a usb_submit_urb warning and disrupts kernel availability.

The record

CVE
CVE-2022-49151
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1200
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.12
  2. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <136bed0bfd3bc9c95c88aafff2d22ecb3a919f23
  3. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <5598442edc29e8f6f2380e4b471dc1a3fcd80508
  4. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <88272b4a37913bdf6f339162a7920bd8e9b49de2
  5. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <b48d1bb3f1ca337ad653022aefb5a40a47dfe5cd
  6. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <cbd110b8dd7ad763bf413f71c0484116ae9302d4
  7. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <ef0acc514123140157b19a9ff2e2de5d91d612bc
  8. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <f2ec3cd0f34f8c3f94bc21fbba14868301c9c49d
  9. Affected versionversion=51f3baad7de943780ce0c17bd7975df567dd6e14 <fa9c1f14002dc0d5293e16a2007bd89b6e79207b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.12; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <136bed0bfd3bc9c95c88aafff2d22ecb3a919f23; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <5598442edc29e8f6f2380e4b471dc1a3fcd80508; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <88272b4a37913bdf6f339162a7920bd8e9b49de2; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <b48d1bb3f1ca337ad653022aefb5a40a47dfe5cd; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <cbd110b8dd7ad763bf413f71c0484116ae9302d4; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <ef0acc514123140157b19a9ff2e2de5d91d612bc; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <f2ec3cd0f34f8c3f94bc21fbba14868301c9c49d; version=51f3baad7de943780ce0c17bd7975df567dd6e14 <fa9c1f14002dc0d5293e16a2007bd89b6e79207b

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

T1200Hardware Additions

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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