← Back to CVE Explorer

CVE-2024-49919

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Add null check for head_pipe in dcn201_acquire_free_pipe_for_layer This commit addresses a potential null pointer dereference issue in the `dcn201_acquire_free_pipe_for_layer` function. The issue could occur when `head_pipe` is null. The fix adds a check to ensure `head_pipe` is not null before asserting it. If `head_pipe` is null, the function returns NULL to prevent a potential null pointer dereference. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn201/dcn201_resource.c:1016 dcn201_acquire_free_pipe_for_layer() error: we previously assumed 'head_pipe' could be null (see line 1010)

Severity
MEDIUM
CVSS score
5.5 (v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2024-10-21 18:15:14.117000
Last modified
2026-10-30 13:17:38.857000
View original CVE JSON 
{
  "id": "CVE-2024-49919",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2024-10-21T18:15:14.117",
  "lastModified": "2026-10-30T13:17:38.857",
  "vulnStatus": "Modified",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Add null check for head_pipe in dcn201_acquire_free_pipe_for_layer\n\nThis commit addresses a potential null pointer dereference issue in the\n`dcn201_acquire_free_pipe_for_layer` function. The issue could occur\nwhen `head_pipe` is null.\n\nThe fix adds a check to ensure `head_pipe` is not null before asserting\nit. If `head_pipe` is null, the function returns NULL to prevent a\npotential null pointer dereference.\n\nReported by smatch:\ndrivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn201/dcn201_resource.c:1016 dcn201_acquire_free_pipe_for_layer() error: we previously assumed 'head_pipe' could be null (see line 1010)"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: drm/amd/display: Agregar comprobación NULL para head_pipe en dcn201_acquire_free_pipe_for_layer Esta confirmación soluciona un posible problema de desreferencia de puntero nulo en la función `dcn201_acquire_free_pipe_for_layer`. El problema podría ocurrir cuando `head_pipe` es nulo. La corrección agrega una comprobación para garantizar que `head_pipe` no sea nulo antes de confirmarlo. Si `head_pipe` es nulo, la función devuelve NULL para evitar una posible desreferencia de puntero nulo. Reportado por smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/resource/dcn201/dcn201_resource.c:1016 Error de dcn201_acquire_free_pipe_for_layer(): anteriormente asumimos que 'head_pipe' podría ser nulo (ver línea 1010)"
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
              "lessThan": "d11ae22a8beee9771d933c1e5c95e217edcdbd38",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
              "lessThan": "16ce8fd94da8599bb6f0496895d392a69aead1c0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
              "lessThan": "390d757621f5f35d11a63ed7d9d3262ead240064",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
              "lessThan": "8a1b1655a490a492a5a6987254c935ecce4eb9de",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c",
              "lessThan": "f22f4754aaa47d8c59f166ba3042182859e5dff7",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/gpu/drm/amd/display/dc/resource/dcn201/dcn201_resource.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "4.15",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "4.15",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.79",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.10.14",
              "lessThanOrEqual": "6.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.11.3",
              "lessThanOrEqual": "6.11.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2024-10-22T13:40:36.842077Z",
          "id": "CVE-2024-49919",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "6.10.14",
              "matchCriteriaId": "652638C5-5F25-4DF3-AD42-DD3252A97152"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionStartIncluding": "6.11",
              "versionEndExcluding": "6.11.3",
              "matchCriteriaId": "54D9C704-D679-41A7-9C40-10A6B1E7FFE9"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/16ce8fd94da8599bb6f0496895d392a69aead1c0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/390d757621f5f35d11a63ed7d9d3262ead240064",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/8a1b1655a490a492a5a6987254c935ecce4eb9de",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    },
    {
      "url": "https://git.kernel.org/stable/c/d11ae22a8beee9771d933c1e5c95e217edcdbd38",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/f22f4754aaa47d8c59f166ba3042182859e5dff7",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ]
    }
  ]
}