---
id: CVE-2026-89976
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  accel/ethosu: fix job completion fence cleanup

  ethosu_ioctl_submit_job() allocates done_fence before validating buffer
  handles
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  accel/ethosu: fix job completion fence cleanup

  ethosu_ioctl_submit_job() allocates done_fence before validating buffer
  handles. Errors after allocation call ethosu_job…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b <
    b3e0f79af1f27339d8d2527c02cc3e8397c2f69f
  - >-
    Linux >= 5a5e9c0228e613f0ef2a58b9782d7c0ea8f1e58b <
    2d2a3adc91950f9a18829dadc7317fb5180a15c5
  - Linux 6.19
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T11:17:08.450'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89976'
references:
  - url: 'https://git.kernel.org/stable/c/2d2a3adc91950f9a18829dadc7317fb5180a15c5'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/b3e0f79af1f27339d8d2527c02cc3e8397c2f69f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.954Z'
epss: 0.00189
epssPercentile: 0.08805
---

## Overview

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

accel/ethosu: fix job completion fence cleanup

ethosu_ioctl_submit_job() allocates done_fence before validating buffer
handles. Errors after allocation call ethosu_job_err_cleanup(), which frees
the job but leaks the uninitialized fence.

A scheduler dependency error also lets ethosu_job_run() return before
dma_fence_init(). Normal cleanup then passes a zeroed refcount to
dma_fence_put().

Release done_fence in the common cleanup path and use
dma_fence_was_initialized() to distinguish initialized fences from raw
allocations.

[robh: also fix goto]

## Remediation

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