---
id: CVE-2023-53453
title: 'drm/radeon: free iio for atombios when driver shutdown'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/radeon: free iio for atombios when driver shutdown

  Fix below kmemleak when unload radeon driver:

  unreferenced object 0xffff9f8608ede200 (size 512):
    comm "system…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    cb109cedbba11c33473e6780c256d8442a9e4460
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    9cdb96b55651c92fc949cfd54124406c3c912b6b
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    f9f55fc64928b5e30d78f861c5fc76db9e769ebb
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    ce9e9d3dcbb0d1551ffd1a7f16e7c051f3ba4140
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    cda2f7efbc2d857220dad32e315a54565b285c1c
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    107b8b542bb9dab4cbdc3276c85fbdd7f6782313
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    e2791f2f4d1d804e45fa91b14295c326b64c65f1
  - >-
    Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 <
    4773fadedca918faec443daaca5e4ea1c0ced144
  - Linux 2.6.31
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T20:21:04.714120Z'
published: '2025-10-01'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T20:31:09.522Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-53453'
references:
  - url: 'https://git.kernel.org/stable/c/cb109cedbba11c33473e6780c256d8442a9e4460'
  - url: 'https://git.kernel.org/stable/c/9cdb96b55651c92fc949cfd54124406c3c912b6b'
  - url: 'https://git.kernel.org/stable/c/f9f55fc64928b5e30d78f861c5fc76db9e769ebb'
  - url: 'https://git.kernel.org/stable/c/ce9e9d3dcbb0d1551ffd1a7f16e7c051f3ba4140'
  - url: 'https://git.kernel.org/stable/c/cda2f7efbc2d857220dad32e315a54565b285c1c'
  - url: 'https://git.kernel.org/stable/c/107b8b542bb9dab4cbdc3276c85fbdd7f6782313'
  - url: 'https://git.kernel.org/stable/c/e2791f2f4d1d804e45fa91b14295c326b64c65f1'
  - url: 'https://git.kernel.org/stable/c/4773fadedca918faec443daaca5e4ea1c0ced144'
tags:
  - cve.org
epss: 0.0016
epssPercentile: 0.05153
ingestedAt: '2026-11-05T22:38:31.796Z'
---

## Overview

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

drm/radeon: free iio for atombios when driver shutdown

Fix below kmemleak when unload radeon driver:

unreferenced object 0xffff9f8608ede200 (size 512):
  comm "systemd-udevd", pid 326, jiffies 4294682822 (age 716.338s)
  hex dump (first 32 bytes):
    00 00 00 00 c4 aa ec aa 14 ab 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<0000000062fadebe>] kmem_cache_alloc_trace+0x2f1/0x500
    [<00000000b6883cea>] atom_parse+0x117/0x230 [radeon]
    [<00000000158c23fd>] radeon_atombios_init+0xab/0x170 [radeon]
    [<00000000683f672e>] si_init+0x57/0x750 [radeon]
    [<00000000566cc31f>] radeon_device_init+0x559/0x9c0 [radeon]
    [<0000000046efabb3>] radeon_driver_load_kms+0xc1/0x1a0 [radeon]
    [<00000000b5155064>] drm_dev_register+0xdd/0x1d0
    [<0000000045fec835>] radeon_pci_probe+0xbd/0x100 [radeon]
    [<00000000e69ecca3>] pci_device_probe+0xe1/0x160
    [<0000000019484b76>] really_probe.part.0+0xc1/0x2c0
    [<000000003f2649da>] __driver_probe_device+0x96/0x130
    [<00000000231c5bb1>] driver_probe_device+0x24/0xf0
    [<0000000000a42377>] __driver_attach+0x77/0x190
    [<00000000d7574da6>] bus_for_each_dev+0x7f/0xd0
    [<00000000633166d2>] driver_attach+0x1e/0x30
    [<00000000313b05b8>] bus_add_driver+0x12c/0x1e0

iio was allocated in atom_index_iio() called by atom_parse(),
but it doesn't got released when the dirver is shutdown.
Fix this kmemleak by free it in radeon_atombios_fini().

## Affected

- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < cb109cedbba11c33473e6780c256d8442a9e4460`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < 9cdb96b55651c92fc949cfd54124406c3c912b6b`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < f9f55fc64928b5e30d78f861c5fc76db9e769ebb`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < ce9e9d3dcbb0d1551ffd1a7f16e7c051f3ba4140`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < cda2f7efbc2d857220dad32e315a54565b285c1c`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < 107b8b542bb9dab4cbdc3276c85fbdd7f6782313`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < e2791f2f4d1d804e45fa91b14295c326b64c65f1`
- `Linux >= 771fe6b912fca54f03e8a72eb63058b582775362 < 4773fadedca918faec443daaca5e4ea1c0ced144`
- `Linux 2.6.31`

## Remediation

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