CVE-2026-43294 (GCVE-0-2026-43294)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-05-09 04:10
VLAI?
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 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
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7a043f978ed1433bddb088a732e9bb91501ebd76 , < 79f42487ed60d0d5ffce97c3bb98f80c3d17735a (git)
Affected: 7a043f978ed1433bddb088a732e9bb91501ebd76 , < 41cda667ffc5074c56279c632b0c20024da6ecdd (git)
Affected: 7a043f978ed1433bddb088a732e9bb91501ebd76 , < 64aa8b3a60a825134f7d866adf05c024bbe0c24c (git)
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    Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c"
          ],
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              "version": "6.18.16",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
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              "status": "unaffected",
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                  "vulnerable": true
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                {
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels\n\nSince commit 56de5e305d4b (\"clk: renesas: r9a07g044: Add MSTOP for RZ/G2L\")\nwe may get the following kernel panic, for some panels, when rebooting:\n\n  systemd-shutdown[1]: Rebooting.\n  Call trace:\n   ...\n   do_serror+0x28/0x68\n   el1h_64_error_handler+0x34/0x50\n   el1h_64_error+0x6c/0x70\n   rzg2l_mipi_dsi_host_transfer+0x114/0x458 (P)\n   mipi_dsi_device_transfer+0x44/0x58\n   mipi_dsi_dcs_set_display_off_multi+0x9c/0xc4\n   ili9881c_unprepare+0x38/0x88\n   drm_panel_unprepare+0xbc/0x108\n\nThis happens for panels that need to send MIPI-DSI commands in their\nunprepare() callback. Since the MIPI-DSI interface is stopped at that\npoint, rzg2l_mipi_dsi_host_transfer() triggers the kernel panic.\n\nFix by moving rzg2l_mipi_dsi_stop() to new callback function\nrzg2l_mipi_dsi_atomic_post_disable().\n\nWith this change we now have the correct power-down/stop sequence:\n\n  systemd-shutdown[1]: Rebooting.\n  rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_disable(): entry\n  ili9881c-dsi 10850000.dsi.0: ili9881c_unprepare(): entry\n  rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_post_disable(): entry\n  reboot: Restarting system"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-09T04:10:07.227Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/79f42487ed60d0d5ffce97c3bb98f80c3d17735a"
        },
        {
          "url": "https://git.kernel.org/stable/c/41cda667ffc5074c56279c632b0c20024da6ecdd"
        },
        {
          "url": "https://git.kernel.org/stable/c/64aa8b3a60a825134f7d866adf05c024bbe0c24c"
        }
      ],
      "title": "drm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43294",
    "datePublished": "2026-05-08T13:11:17.483Z",
    "dateReserved": "2026-05-01T14:12:55.999Z",
    "dateUpdated": "2026-05-09T04:10:07.227Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43294\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-08T14:16:36.487\",\"lastModified\":\"2026-05-08T14:16:36.487\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ndrm: renesas: rz-du: mipi_dsi: fix kernel panic when rebooting for some panels\\n\\nSince commit 56de5e305d4b (\\\"clk: renesas: r9a07g044: Add MSTOP for RZ/G2L\\\")\\nwe may get the following kernel panic, for some panels, when rebooting:\\n\\n  systemd-shutdown[1]: Rebooting.\\n  Call trace:\\n   ...\\n   do_serror+0x28/0x68\\n   el1h_64_error_handler+0x34/0x50\\n   el1h_64_error+0x6c/0x70\\n   rzg2l_mipi_dsi_host_transfer+0x114/0x458 (P)\\n   mipi_dsi_device_transfer+0x44/0x58\\n   mipi_dsi_dcs_set_display_off_multi+0x9c/0xc4\\n   ili9881c_unprepare+0x38/0x88\\n   drm_panel_unprepare+0xbc/0x108\\n\\nThis happens for panels that need to send MIPI-DSI commands in their\\nunprepare() callback. Since the MIPI-DSI interface is stopped at that\\npoint, rzg2l_mipi_dsi_host_transfer() triggers the kernel panic.\\n\\nFix by moving rzg2l_mipi_dsi_stop() to new callback function\\nrzg2l_mipi_dsi_atomic_post_disable().\\n\\nWith this change we now have the correct power-down/stop sequence:\\n\\n  systemd-shutdown[1]: Rebooting.\\n  rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_disable(): entry\\n  ili9881c-dsi 10850000.dsi.0: ili9881c_unprepare(): entry\\n  rzg2l-mipi-dsi 10850000.dsi: rzg2l_mipi_dsi_atomic_post_disable(): entry\\n  reboot: Restarting system\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/41cda667ffc5074c56279c632b0c20024da6ecdd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/64aa8b3a60a825134f7d866adf05c024bbe0c24c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/79f42487ed60d0d5ffce97c3bb98f80c3d17735a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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