---
id: CVE-2026-43294
title: 'drm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels'
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels

  Since commit 56de5e305d4b ("clk: renesas: r9a07g044: Add MSTOP for RZ/G2L")
  we may get t…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 <
    3cd7a71958c9f7f1def1a110e1ac98c022a554cd
  - >-
    Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 <
    ad9a3246e76b83cd19eb07088111a743a9558bcd
  - >-
    Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 <
    79f42487ed60d0d5ffce97c3bb98f80c3d17735a
  - >-
    Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 <
    41cda667ffc5074c56279c632b0c20024da6ecdd
  - >-
    Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 <
    64aa8b3a60a825134f7d866adf05c024bbe0c24c
  - Linux 6.2
published: '2026-05-08'
updated: '2026-10-21'
sourceUpdated: '2026-10-21T12:40:29.748Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-43294'
references:
  - url: 'https://git.kernel.org/stable/c/3cd7a71958c9f7f1def1a110e1ac98c022a554cd'
  - url: 'https://git.kernel.org/stable/c/ad9a3246e76b83cd19eb07088111a743a9558bcd'
  - url: 'https://git.kernel.org/stable/c/79f42487ed60d0d5ffce97c3bb98f80c3d17735a'
  - url: 'https://git.kernel.org/stable/c/41cda667ffc5074c56279c632b0c20024da6ecdd'
  - url: 'https://git.kernel.org/stable/c/64aa8b3a60a825134f7d866adf05c024bbe0c24c'
tags:
  - cve.org
epss: 0.0016
epssPercentile: 0.04784
ingestedAt: '2026-10-21T12:48:53.641Z'
---

## Overview

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

drm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels

Since commit 56de5e305d4b ("clk: renesas: r9a07g044: Add MSTOP for RZ/G2L")
we may get the following kernel panic, for some panels, when rebooting:

  systemd-shutdown[1]: Rebooting.
  Call trace:
   ...
   do_serror+0x28/0x68
   el1h_64_error_handler+0x34/0x50
   el1h_64_error+0x6c/0x70
   rzg2l_mipi_dsi_host_transfer+0x114/0x458 (P)
   mipi_dsi_device_transfer+0x44/0x58
   mipi_dsi_dcs_set_display_off_multi+0x9c/0xc4
   ili9881c_unprepare+0x38/0x88
   drm_panel_unprepare+0xbc/0x108

This happens for panels that need to send MIPI-DSI commands in their
unprepare() callback. Since the MIPI-DSI interface is stopped at that
point, rzg2l_mipi_dsi_host_transfer() triggers the kernel panic.

Fix by moving rzg2l_mipi_dsi_stop() to new callback function
rzg2l_mipi_dsi_atomic_post_disable().

With this change we now have the correct power-down/stop sequence:

  systemd-shutdown[1]: Rebooting.
  rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_disable(): entry
  ili9881c-dsi 10850000.dsi.0: ili9881c_unprepare(): entry
  rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_post_disable(): entry
  reboot: Restarting system

## Affected

- `Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 < 3cd7a71958c9f7f1def1a110e1ac98c022a554cd`
- `Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 < ad9a3246e76b83cd19eb07088111a743a9558bcd`
- `Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 < 79f42487ed60d0d5ffce97c3bb98f80c3d17735a`
- `Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 < 41cda667ffc5074c56279c632b0c20024da6ecdd`
- `Linux >= 7a043f978ed1433bddb088a732e9bb91501ebd76 < 64aa8b3a60a825134f7d866adf05c024bbe0c24c`
- `Linux 6.2`

## Remediation

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