---
title: "CVE-2026-93042: Linux Kernel dmaengine - Use After Free"
description: "Linux kernel dmaengine dw-edma contains a use-after-free vulnerability caused by late callbacks after dmaengine_terminate_sync() in descriptor termination, letting attackers cause memory corruption or leaks, exploit requires device to perform DMA transfers."
url: https://panop.io/threat-heartbeat/CVE-2026-93042/
---

# CVE-2026-93042 Linux Kernel dmaengine - Use After Free

Linux kernel dmaengine dw-edma contains a use-after-free vulnerability caused by late callbacks after dmaengine\_terminate\_sync() in descriptor termination, letting attackers cause memory corruption or leaks, exploit requires device to perform DMA transfers.

CVSS base score 8.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.40% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-93042)

## Details

Type

Use After Free

Impact

Use After Free, Information Disclosure

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Published

17 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for dw-edma descriptor termination.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-93042](https://nvd.nist.gov/vuln/detail/CVE-2026-93042)
- [https://git.kernel.org/stable/c/4793f9099a1cadf4e37f3a03d524af6bce88a0ea](https://git.kernel.org/stable/c/4793f9099a1cadf4e37f3a03d524af6bce88a0ea)
- [https://git.kernel.org/stable/c/65e387b95d3855aa894ac729e1778e5bcb9083cb](https://git.kernel.org/stable/c/65e387b95d3855aa894ac729e1778e5bcb9083cb)
- [https://git.kernel.org/stable/c/99109a51efd28c9a661fbfb9469b023c517b31d1](https://git.kernel.org/stable/c/99109a51efd28c9a661fbfb9469b023c517b31d1)
- [https://git.kernel.org/stable/c/be87d86537de7ea6fd025f41033d2faff880973f](https://git.kernel.org/stable/c/be87d86537de7ea6fd025f41033d2faff880973f)
- [https://git.kernel.org/stable/c/f3ec6702a1d216be61f692cc0a983d6c8fb5ebf7](https://git.kernel.org/stable/c/f3ec6702a1d216be61f692cc0a983d6c8fb5ebf7)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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