{
  "cveId": "CVE-2026-46245",
  "url": "https://patchblox.com/security/cve/CVE-2026-46245",
  "summary": "CVE-2026-46245 is fixed in 16 products on 1 platform, first by DEBIAN-CVE-2026-46245, released June 24, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "drm/amd/display: Fix dc_link NULL handling in HPD init",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/amd/display: Fix dc_link NULL handling in HPD init  amdgpu_dm_hpd_init() may see connectors without a valid dc_link.  The code already checks dc_link for the polling decision, but later unconditionally dereferences it when setting up HPD interrupts.  Assign dc_link early and skip connectors where it is NULL.  Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c:940 amdgpu_dm_hpd_init() error: we previously assumed \u0027dc_link\u0027 could be null (see line 931)  drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm_irq.c     923                 /*     924                  * Analog connectors may be hot-plugged unlike other connector     925                  * types that don\u0027t support HPD. Only poll analog connectors.     926                  */     927                 use_polling |=     928                         amdgpu_dm_connector-\u003Edc_link \u0026\u0026                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The patch adds this NULL check but hopefully it can be removed      929                         dc_connector_supports_analog(amdgpu_dm_connector-\u003Edc_link-\u003Elink_id.id);     930     931                 dc_link = amdgpu_dm_connector-\u003Edc_link;  dc_link assigned here.      932     933                 /*     934                  * Get a base driver irq reference for hpd ints for the lifetime     935                  * of dm. Note that only hpd interrupt types are registered with     936                  * base driver; hpd_rx types aren\u0027t. IOW, amdgpu_irq_get/put on     937                  * hpd_rx isn\u0027t available. DM currently controls hpd_rx     938                  * explicitly with dc_interrupt_set()     939                  */ --\u003E 940                 if (dc_link-\u003Eirq_source_hpd != DC_IRQ_SOURCE_INVALID) {                             ^^^^^^^^^^^^^^^^^^^^^^^ If it\u0027s NULL then we are trouble because we dereference it here.      941                         irq_type = dc_link-\u003Eirq_source_hpd - DC_IRQ_SOURCE_HPD1;     942                         /*     943                          * TODO: There\u0027s a mismatch between mode_info.num_hpd     944                          * and what bios reports as the # of connectors with hpd",
  "published": "2026-06-03T18:16:24Z",
  "severity": "Moderate",
  "cvss": 5.5,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
  "epss": 0.00155,
  "epssPercentile": 0.04641,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-46245",
  "fixes": [
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      "product": "dtb-aarch64",
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      "released": "2026-08-12T01:09:28Z"
    },
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      "product": "kernel-64kb",
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    {
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      "fix": "SUSE-SU-2026:3790-1",
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      "released": "2026-08-25T12:24:44Z"
    },
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      "fix": "SUSE-SU-2026:23231-1",
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      "released": "2026-08-11T21:26:34Z"
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      "product": "kernel-azure",
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  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}