---
id: CVE-2026-90130
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vdpa_sim: fix cleanup after worker creation failure

  vdpasim_create() leaves vdpasim->worker as an ERR_PTR when
  kthread_run_worker() fails
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  vdpa_sim: fix cleanup after worker creation failure

  vdpasim_create() leaves vdpasim->worker as an ERR_PTR when
  kthread_run_worker() fails. The error path then drops th…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f <
    feafa109f031ed111f7f968e447c13985db498e0
  - >-
    Linux >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f <
    05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0
  - >-
    Linux >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f <
    68b726b3a01fb02a68843781b17d05ef3d759987
  - >-
    Linux >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f <
    ca6f3fa599cb764518df595368b743f856fdb516
  - >-
    Linux >= 76acfa7bc54f1e3b9dde396e0a3534493419fd6f <
    bd670e5dfd2b01fd9692f61fa1456434c54026a4
  - Linux 6.4
published: '2026-09-17'
updated: '2026-09-17'
sourceUpdated: '2026-09-17T17:17:05.493'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-90130'
references:
  - url: 'https://git.kernel.org/stable/c/05ddc94afb69e36df59e88cfa9e5c7bf9d10cfd0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/68b726b3a01fb02a68843781b17d05ef3d759987'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bd670e5dfd2b01fd9692f61fa1456434c54026a4'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/ca6f3fa599cb764518df595368b743f856fdb516'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/feafa109f031ed111f7f968e447c13985db498e0'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-17T16:21:47.881Z'
epss: 0.002
epssPercentile: 0.10122
---

## Overview

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

vdpa_sim: fix cleanup after worker creation failure

vdpasim_create() leaves vdpasim->worker as an ERR_PTR when
kthread_run_worker() fails. The error path then drops the device
reference, which releases the partially initialized simulator.

vdpasim_free() unconditionally passes the worker pointer to
kthread_destroy_worker(), so the ERR_PTR is dereferenced and can trigger
a general protection fault.

Store the worker error, clear the pointer, and only clean up the worker
when it was successfully initialized. Also make the release path tolerate
partially initialized objects by guarding virtqueue and IOTLB cleanup,
since the same release path can be reached from other initialization
failures.

I found this bug myself, though the patch was written with AI assistance.

## Remediation

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