---
id: CVE-2026-43425
title: 'usb: image: mdc800: kill download URB on timeout'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: image: mdc800: kill download URB on timeout

  mdc800_device_read() submits download_urb and waits for completion.
  If the timeout fires and the device has not respon…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    9fa5a49760979ba016506fe292a431c8b83f043e
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    15536f6c15f48037a1672cbdea53266d67861ff6
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    9bf877cc67309b2a063b0087c3ad8585fb11cec3
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    155f471e38aa516f6c58c2ae03ca3dc222fa2fdb
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    d4a400a6a4c4d49f77a04a3f401df5ae1a10657c
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    b7fed917f84e484e06c5e9926746d0b524e3a93e
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    cc7398447810c9450c90d092efe9997569f8d96f
  - >-
    Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <
    1be3b77de4eb89af8ae2fd6610546be778e25589
  - Linux 2.6.12
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T15:38:04.028838Z'
published: '2026-05-08'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T15:42:53.045Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43425'
references:
  - url: 'https://git.kernel.org/stable/c/9fa5a49760979ba016506fe292a431c8b83f043e'
  - url: 'https://git.kernel.org/stable/c/15536f6c15f48037a1672cbdea53266d67861ff6'
  - url: 'https://git.kernel.org/stable/c/9bf877cc67309b2a063b0087c3ad8585fb11cec3'
  - url: 'https://git.kernel.org/stable/c/155f471e38aa516f6c58c2ae03ca3dc222fa2fdb'
  - url: 'https://git.kernel.org/stable/c/d4a400a6a4c4d49f77a04a3f401df5ae1a10657c'
  - url: 'https://git.kernel.org/stable/c/b7fed917f84e484e06c5e9926746d0b524e3a93e'
  - url: 'https://git.kernel.org/stable/c/cc7398447810c9450c90d092efe9997569f8d96f'
  - url: 'https://git.kernel.org/stable/c/1be3b77de4eb89af8ae2fd6610546be778e25589'
tags:
  - cve.org
epss: 0.00123
epssPercentile: 0.0203
ingestedAt: '2026-11-06T15:54:03.922Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

usb: image: mdc800: kill download URB on timeout

mdc800_device_read() submits download_urb and waits for completion.
If the timeout fires and the device has not responded, the function
returns without killing the URB, leaving it active.

A subsequent read() resubmits the same URB while it is still
in-flight, triggering the WARN in usb_submit_urb():

  "URB submitted while active"

Check the return value of wait_event_timeout() and kill the URB if
it indicates timeout, ensuring the URB is complete before its status
is inspected or the URB is resubmitted.

Similar to
- commit 372c93131998 ("USB: yurex: fix control-URB timeout handling")
- commit b98d5000c505 ("media: rc: iguanair: handle timeouts")

## Affected

- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9fa5a49760979ba016506fe292a431c8b83f043e`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 15536f6c15f48037a1672cbdea53266d67861ff6`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9bf877cc67309b2a063b0087c3ad8585fb11cec3`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 155f471e38aa516f6c58c2ae03ca3dc222fa2fdb`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d4a400a6a4c4d49f77a04a3f401df5ae1a10657c`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b7fed917f84e484e06c5e9926746d0b524e3a93e`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < cc7398447810c9450c90d092efe9997569f8d96f`
- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1be3b77de4eb89af8ae2fd6610546be778e25589`
- `Linux 2.6.12`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.