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CVE-2026-89821

Estado: RecibidaSin puntuar—

In the Linux kernel, the following vulnerability has been resolved:

drm/amd/display: avoid divide-by-zero in __is_lut_linear()

__is_lut_linear() computes the expected value of each entry with

If it is ever called with a single-entry LUT, size - 1 is zero and the kernel takes a divide error (#DE). A LUT with fewer than two entries cannot describe a linear mapping anyway, so return false early instead of dividing by zero.

Detalles técnicos trazas, registros y código del informe original
	expected = i * MAX_DRM_LUT_VALUE / (size - 1);

CVSS

NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.

Linux — Linux KernelAI

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2026-89821",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "2320626425f3af3a25b8afb6876f205b1c6d4e64",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "d1e06d5dc8f12451ce71dc068342660a34476084",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "c127ace7af2b40107947a6504391f94d6fd21734",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "5f18cd1ba873e751bf5547407ad44ea34adfbe2f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "ee28fafb50f58b847509b5240b431ddec673bdfe",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "15ee43aad0df43dfd1dbb32e7d5b951745c4b87f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "086247a4b2fba49800b27807f22bb894cd8363fb",
              "lessThan": "4f40873f8a4107df2b9c8e68c947c4fd0cd519d2",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.17"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.17",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-16T11:16:47.503",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: avoid divide-by-zero in __is_lut_linear()\n\n__is_lut_linear() computes the expected value of each entry with\n\n\texpected = i * MAX_DRM_LUT_VALUE / (size - 1);\n\nIf it is ever called with a single-entry LUT, size - 1 is zero and the\nkernel takes a divide error (#DE). A LUT with fewer than two entries\ncannot describe a linear mapping anyway, so return false early instead\nof dividing by zero."
    }
  ],
  "lastModified": "2026-09-16T11:16:47.503",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}