CVE-2026-43250

Kernel memory corruption via stale DMA mappings

Published May 6, 2026 · Updated May 6, 2026

Memory corruption in the Linux Kernel ChipIdea UDC driver allows local users to compromise kernel memory during USB reconnection. The _ep_nuke() shutdown path returns aborted requests without unmapping DMA buffers or clearing scatter-gather bounce state, so _hardware_enqueue() can reuse freed or invalid DMA addresses. Triggering the flaw requires a disconnect during an active multi-segment transfer, followed by reuse of the same request after reconnection; the resulting alignment errors can corrupt kernel memory.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the Linux Kernel ChipIdea UDC driver allows local users to compromise kernel memory during USB reconnection. The _ep_nuke() shutdown path returns aborted requests without unmapping DMA buffers or clearing scatter-gather bounce state, so _hardware_enqueue() can reuse freed or invalid DMA addresses. Triggering the flaw requires a disconnect during an active multi-segment transfer, followed by reuse of the same request after reconnection; the resulting alignment errors can corrupt kernel memory.

The record

CVE
CVE-2026-43250
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 2026Record 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 <1b72b834511d17f4d069d512f78671f3f210a2f1
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cea2a1257a3b5ea3e769a445b34af13e6aa5a123
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e74c436f8568af1c60942469d0a2300b3ada3857
  4. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f4fbf2d4750d12ac8525d2efac1016fa0d84d4ec

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b72b834511d17f4d069d512f78671f3f210a2f1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cea2a1257a3b5ea3e769a445b34af13e6aa5a123; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e74c436f8568af1c60942469d0a2300b3ada3857; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f4fbf2d4750d12ac8525d2efac1016fa0d84d4ec

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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-787Out-of-bounds Write

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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