drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()'

{
  "id": "b7d57fd3e4e1352818db030ef97fbd994ac40808da84dd04c777e74b92e40a45",
  "url": "https://osv.dev/vulnerability/CVE-2024-26647",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()'",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix late derefrence 'dsc' check in 'link_set_dsc_pps_packet()' In link_set_dsc_pps_packet(), 'struct display_stream_compressor *dsc' was dereferenced in a DC_LOGGER_INIT(dsc->ctx->logger); before the 'dsc' NULL pointer check. Fixes the below: drivers/gpu/drm/amd/amdgpu/../display/dc/link/link_dpms.c:905 link_set_dsc_pps_packet() warn: variable dereferenced before check 'dsc' (see line 903)",
    "evidence": "osv:CVE-2024-26647",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.15",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.7.3",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-26647",
      "aliases": [
        "CVE-2024-26647"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "6ca7415f11af5200ab10bd420b513f846e9bfb99"
                },
                {
                  "fixed": "6aa5ede6665122f4c8abce3c6eba06b49e54d25c"
                },
                {
                  "fixed": "cf656fc7276e5b3709a81bc9d9639459be2b2647"
                },
                {
                  "fixed": "3bb9b1f958c3d986ed90a3ff009f1e77e9553207"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26647.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.3.0"
                },
                {
                  "fixed": "6.6.15"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.7.3"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26647.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:52.442211021Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/3bb9b1f958c3d986ed90a3ff009f1e77e9553207",
        "https://git.kernel.org/stable/c/6aa5ede6665122f4c8abce3c6eba06b49e54d25c",
        "https://git.kernel.org/stable/c/cf656fc7276e5b3709a81bc9d9639459be2b2647",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26647.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-26647",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26647.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-26647",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 521069,
  "published_at": "2024-03-26T17:50:01.057+00:00"
}