{
  "affected": [
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:12",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.1.176-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:13",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "6.12.94-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "ecosystem_specific": {
        "urgency": "not yet assigned"
      },
      "package": {
        "ecosystem": "Debian:14",
        "name": "linux"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "7.0.12-1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "details": "In the Linux kernel, the following vulnerability has been resolved:  drm/amd/display: Validate payload length and link_index in dc_process_dmub_aux_transfer_async  [Why\u0026How] dc_process_dmub_aux_transfer_async() copies payload-\u003elength bytes into a 16-byte stack buffer (dpaux.data[16]) guarded only by an ASSERT(), which is a no-op in release builds. If a caller ever passes length \u003e 16 this results in a stack buffer overflow via memcpy.  Additionally, link_index is used to dereference dc-\u003elinks[] without bounds checking against dc-\u003elink_count, risking an out-of-bounds access.  Replace the ASSERT with a hard runtime check that returns false when payload-\u003elength exceeds the destination buffer size, and add a bounds check for link_index before it is used.  (cherry picked from commit ba4caa9fecdf7a38f98c878ad05a8a64148b6881)",
  "id": "DEBIAN-CVE-2026-64219",
  "modified": "2026-09-14T16:47:31.859058509Z",
  "published": "2026-07-24T16:16:49.670Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://security-tracker.debian.org/tracker/CVE-2026-64219"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "upstream": [
    "CVE-2026-64219"
  ]
}