{
  "cveId": "CVE-2026-98786",
  "url": "https://patchblox.com/security/cve/CVE-2026-98786",
  "summary": "CVE-2026-98786 is fixed in linux on 1 platform by DEBIAN-CVE-2026-98786 (version 7.2.10-1), released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "drm/amd/display: guard dc_sink dereferences in MST mode validation",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  drm/amd/display: guard dc_sink dereferences in MST mode validation  dm_dp_mst_is_port_support_mode() reads aconnector-\u003Edc_sink-\u003Edsc_caps... for the DSC branch-throughput check, and get_conv_frl_bw()\u0027s HDMI-PCON FRL-bandwidth path reads aconnector-\u003Edc_sink-\u003Eedid_caps.max_frl_rate, both without a NULL check. dc_sink is cleared asynchronously on MST unplug, and both functions run from paths that the driver\u0027s own comments document as racing that teardown: the connector probe worker\u0027s -\u003Emode_valid callback and a compositor\u0027s atomic check, neither of which holds the MST manager lock that the teardown path uses. The former does have an existing dsc_aux NULL check, but dsc_aux isn\u0027t reliably cleared in every path that clears dc_sink, so it doesn\u0027t cover this.  Fail the port-support check and skip the FRL conversion path when the sink is already gone.  (cherry picked from commit 7c3db8da4e039698ae198c870712428644e965c7)",
  "published": "2026-10-18T16:17:32Z",
  "severity": "Moderate",
  "cvss": 4,
  "epss": 0.00166,
  "epssPercentile": 0.05862,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-98786",
  "fixes": [
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "7.2.10-1",
      "fix": "DEBIAN-CVE-2026-98786",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-98786",
      "released": "2026-10-19T16:27:52Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}