---
title: "CVE-2026-89941: Linux Kernel - Use After Free"
description: "Linux kernel contains a use-after-free vulnerability in iio_dma_fence caused by unsafe dma_fence release implementation, letting attackers cause memory corruption, exploit requires kernel-level access."
url: https://panop.io/threat-heartbeat/CVE-2026-89941/
---

# CVE-2026-89941 Linux Kernel - Use After Free

Linux kernel contains a use-after-free vulnerability in iio\_dma\_fence caused by unsafe dma\_fence release implementation, letting attackers cause memory corruption, exploit requires kernel-level access.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.16% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-89941)

## Details

Type

Use After Free

Impact

Privilege Escalation, Denial Of Service

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

## Vendor fix

Update to the latest Linux kernel version containing the fix for iio\_dma\_fence release implementation.

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-2026-89941](https://nvd.nist.gov/vuln/detail/CVE-2026-89941)
- [https://git.kernel.org/stable/c/06a9460b8b792e109cbc934a856d02e5cff217ef](https://git.kernel.org/stable/c/06a9460b8b792e109cbc934a856d02e5cff217ef)
- [https://git.kernel.org/stable/c/11cef99491117d4264603df159c4ff5f3845a059](https://git.kernel.org/stable/c/11cef99491117d4264603df159c4ff5f3845a059)
- [https://git.kernel.org/stable/c/311595dc0b5621f74d8eb4dc38ef4efcdfe7e769](https://git.kernel.org/stable/c/311595dc0b5621f74d8eb4dc38ef4efcdfe7e769)
- [https://git.kernel.org/stable/c/8662e56c31cf23b61ca3d11b516efb94c35b8026](https://git.kernel.org/stable/c/8662e56c31cf23b61ca3d11b516efb94c35b8026)

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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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