{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.19.11-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  drm/mediatek: dsi: Store driver data before invoking mipi_dsi_host_register  The call to mipi_dsi_host_register triggers a callback to mtk_dsi_bind, which uses dev_get_drvdata to retrieve the mtk_dsi struct, so this structure needs to be stored inside the driver data before invoking it.  As drvdata is currently uninitialized it leads to a crash when registering the DSI DRM encoder right after acquiring the mode_config.idr_mutex, blocking all subsequent DRM operations.  Fixes the following crash during mediatek-drm probe (tested on Xiaomi Smart Clock x04g):  Unable to handle kernel NULL pointer dereference at virtual address  0000000000000040 [...] Modules linked in: mediatek_drm(+) drm_display_helper cec drm_client_lib  drm_dma_helper drm_kms_helper panel_simple [...] Call trace:  drm_mode_object_add+0x58/0x98 (P)  __drm_encoder_init+0x48/0x140  drm_encoder_init+0x6c/0xa0  drm_simple_encoder_init+0x20/0x34 [drm_kms_helper]  mtk_dsi_bind+0x34/0x13c [mediatek_drm]  component_bind_all+0x120/0x280  mtk_drm_bind+0x284/0x67c [mediatek_drm]  try_to_bring_up_aggregate_device+0x23c/0x320  __component_add+0xa4/0x198  component_add+0x14/0x20  mtk_dsi_host_attach+0x78/0x100 [mediatek_drm]  mipi_dsi_attach+0x2c/0x50  panel_simple_dsi_probe+0x4c/0x9c [panel_simple]  mipi_dsi_drv_probe+0x1c/0x28  really_probe+0xc0/0x3dc  __driver_probe_device+0x80/0x160  driver_probe_device+0x40/0x120  __device_attach_driver+0xbc/0x17c  bus_for_each_drv+0x88/0xf0  __device_attach+0x9c/0x1cc  device_initial_probe+0x54/0x60  bus_probe_device+0x34/0xa0  device_add+0x5b0/0x800  mipi_dsi_device_register_full+0xdc/0x16c  mipi_dsi_host_register+0xc4/0x17c  mtk_dsi_probe+0x10c/0x260 [mediatek_drm]  platform_probe+0x5c/0xa4  really_probe+0xc0/0x3dc  __driver_probe_device+0x80/0x160  driver_probe_device+0x40/0x120  __driver_attach+0xc8/0x1f8  bus_for_each_dev+0x7c/0xe0  driver_attach+0x24/0x30  bus_add_driver+0x11c/0x240  driver_register+0x68/0x130  __platform_register_drivers+0x64/0x160  mtk_drm_init+0x24/0x1000 [mediatek_drm]  do_one_initcall+0x60/0x1d0  do_init_module+0x54/0x240  load_module+0x1838/0x1dc0  init_module_from_file+0xd8/0xf0  __arm64_sys_finit_module+0x1b4/0x428  invoke_syscall.constprop.0+0x48/0xc8  do_el0_svc+0x3c/0xb8  el0_svc+0x34/0xe8  el0t_64_sync_handler+0xa0/0xe4  el0t_64_sync+0x198/0x19c Code: 52800022 941004ab 2a0003f3 37f80040 (29005a80)",
  "id": "DEBIAN-CVE-2026-31562",
  "modified": "2026-09-14T16:47:43.014376354Z",
  "published": "2026-04-24T15:16:30.610Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-31562"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-31562"
  ]
}