# CVE-2026-43425: usb: image: mdc800: kill download URB on timeout

Status: published. Published: 2026-05-08. Updated: 2026-11-06.

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")

## Remediation

No remediation reported in collected sources

## Affected products and versions

- Linux / Linux: ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 9fa5a49760979ba016506fe292a431c8b83f043e (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 15536f6c15f48037a1672cbdea53266d67861ff6 (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 9bf877cc67309b2a063b0087c3ad8585fb11cec3 (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 155f471e38aa516f6c58c2ae03ca3dc222fa2fdb (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < d4a400a6a4c4d49f77a04a3f401df5ae1a10657c (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < b7fed917f84e484e06c5e9926746d0b524e3a93e (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < cc7398447810c9450c90d092efe9997569f8d96f (affected, git); ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2; < 1be3b77de4eb89af8ae2fd6610546be778e25589 (affected, git). Source: CNA: Linux
- Linux / Linux: 2.6.12 (affected); ≥ 0; < 2.6.12 (unaffected, semver); ≥ 5.10.253; ≤ 5.10.* (unaffected, semver); ≥ 5.15.203; ≤ 5.15.* (unaffected, semver); ≥ 6.1.167; ≤ 6.1.* (unaffected, semver); ≥ 6.6.130; ≤ 6.6.* (unaffected, semver); ≥ 6.12.78; ≤ 6.12.* (unaffected, semver); ≥ 6.18.19; ≤ 6.18.* (unaffected, semver); ≥ 6.19.9; ≤ 6.19.* (unaffected, semver); ≥ 7.0; ≤ * (unaffected, original_commit_for_fix). Source: CNA: Linux

## Severity and prioritization

- CISA KEV: No listing in collected sources

- EPSS: 0.12% as of 2026-11-06; percentile 2.04%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: Not reported

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://git.kernel.org/stable/c/9fa5a49760979ba016506fe292a431c8b83f043e (CNA: Linux)

- https://git.kernel.org/stable/c/15536f6c15f48037a1672cbdea53266d67861ff6 (CNA: Linux)

- https://git.kernel.org/stable/c/9bf877cc67309b2a063b0087c3ad8585fb11cec3 (CNA: Linux)

- https://git.kernel.org/stable/c/155f471e38aa516f6c58c2ae03ca3dc222fa2fdb (CNA: Linux)

- https://git.kernel.org/stable/c/d4a400a6a4c4d49f77a04a3f401df5ae1a10657c (CNA: Linux)

- https://git.kernel.org/stable/c/b7fed917f84e484e06c5e9926746d0b524e3a93e (CNA: Linux)

- https://git.kernel.org/stable/c/cc7398447810c9450c90d092efe9997569f8d96f (CNA: Linux)

- https://git.kernel.org/stable/c/1be3b77de4eb89af8ae2fd6610546be778e25589 (CNA: Linux)

## Provenance

- CNA: Linux: https://www.cve.org/CVERecord?id=CVE-2026-43425; retrieved 2026-11-06; source updated 2026-11-06

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-43425; retrieved 2026-11-06; source updated Not reported

Revision: 6db386f2de4d9d9672e30ffcf7763ac6ba56f73b2b75c369058717eae2b50abf

Canonical: https://y2.dev/cve/CVE-2026-43425

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