---
id: CVE-2026-68214
title: 'media: rtl2832: fix use-after-free in rtl2832_remove()'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  media: rtl2832: fix use-after-free in rtl2832_remove()

  cancel_delayed_work_sync() is called before i2c_mux_del_adapters()
  in rtl2832_remove(). While the cancel waits f…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    1e8a6bc19403661661fed5ae82f6eca6c9cdfad2
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    68a9c0290897c1436ddceb8cea604c93377a0299
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    13c06056699e66ff7109ba68658cc6ea4a23f516
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    9acd5bbbe1df8e487e49488692c224496d4c9e16
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    24bef237eef8dd1ebcffb129ba21891ddad0d309
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    2c71bda6edc630a1f8c3c45d8df5fc22d234e042
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    90d781711418881f8c836c2a859cc2886625d750
  - >-
    Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 <
    680daf40a82d483949f87f0d8f98639dc47e610c
  - Linux 4.7
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-06T16:44:42.918474Z'
published: '2026-08-10'
updated: '2026-11-06'
sourceUpdated: '2026-11-06T16:55:09.435Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-68214'
references:
  - url: 'https://git.kernel.org/stable/c/1e8a6bc19403661661fed5ae82f6eca6c9cdfad2'
  - url: 'https://git.kernel.org/stable/c/68a9c0290897c1436ddceb8cea604c93377a0299'
  - url: 'https://git.kernel.org/stable/c/13c06056699e66ff7109ba68658cc6ea4a23f516'
  - url: 'https://git.kernel.org/stable/c/9acd5bbbe1df8e487e49488692c224496d4c9e16'
  - url: 'https://git.kernel.org/stable/c/24bef237eef8dd1ebcffb129ba21891ddad0d309'
  - url: 'https://git.kernel.org/stable/c/2c71bda6edc630a1f8c3c45d8df5fc22d234e042'
  - url: 'https://git.kernel.org/stable/c/90d781711418881f8c836c2a859cc2886625d750'
  - url: 'https://git.kernel.org/stable/c/680daf40a82d483949f87f0d8f98639dc47e610c'
tags:
  - cve.org
epss: 0.0022
epssPercentile: 0.12607
ingestedAt: '2026-11-06T18:00:12.620Z'
---

## Overview

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

media: rtl2832: fix use-after-free in rtl2832_remove()

cancel_delayed_work_sync() is called before i2c_mux_del_adapters()
in rtl2832_remove(). While the cancel waits for any running instance
of i2c_gate_work to finish, it does not prevent the timer from being
rescheduled by a concurrent thread.

During probe, the r820t_attach() call attempts I2C transfers through
the mux adapter. These transfers go through i2c_mux_master_xfer(),
which calls rtl2832_deselect() after the transfer completes,
rescheduling i2c_gate_work via schedule_delayed_work(). If this
transfer is still in flight when rtl2832_remove() runs,
rtl2832_deselect() can reschedule i2c_gate_work after it has been
cancelled, causing a use-after-free when kfree(dev) is called.

Fix this by calling i2c_mux_del_adapters() before
cancel_delayed_work_sync(). Once the mux adapter is unregistered, no
new I2C transfers can go through it, so rtl2832_deselect() can no
longer reschedule i2c_gate_work. The subsequent
cancel_delayed_work_sync() is then guaranteed to be final.

## Affected

- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 1e8a6bc19403661661fed5ae82f6eca6c9cdfad2`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 68a9c0290897c1436ddceb8cea604c93377a0299`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 13c06056699e66ff7109ba68658cc6ea4a23f516`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 9acd5bbbe1df8e487e49488692c224496d4c9e16`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 24bef237eef8dd1ebcffb129ba21891ddad0d309`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 2c71bda6edc630a1f8c3c45d8df5fc22d234e042`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 90d781711418881f8c836c2a859cc2886625d750`
- `Linux >= cddcc40b1b1553010acb89add84c64b5d123ec94 < 680daf40a82d483949f87f0d8f98639dc47e610c`
- `Linux 4.7`

## Remediation

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