{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "980f8710075acaeb226a94cde6dda8ffad30123c"
            },
            {
              "fixed": "f6f04d8ae5725bcc893bdc62e3467efd97255c5b"
            },
            {
              "fixed": "0b2615b8b54f58bbdf986dffb38cbc35214a5cc5"
            },
            {
              "fixed": "b10cc09b329245c6d95f8fa3e7f068575e3e0e9f"
            },
            {
              "fixed": "e4c3ab59021e7c146a84b6671f0d530972bd58b4"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "6.8.0"
            },
            {
              "fixed": "6.12.110"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.51"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.5"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89819.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: validate plane degamma LUT size for private color prop\n\nUnlike the CRTC degamma path, which is guarded by\namdgpu_dm_verify_lut_sizes(), the per-plane degamma LUT size was never\nvalidated before use. __set_dm_plane_degamma() passed the user-supplied\nsize straight into __is_lut_linear() and, for a non-linear LUT, into\n__set_input_tf() -\u003e __drm_lut_to_dc_gamma(), the latter always iterating\nMAX_COLOR_LUT_ENTRIES entries regardless of the actual LUT size.\n\nA malformed AMD_PLANE_DEGAMMA_LUT blob (e.g. a single entry) could thus\ntrigger a divide-by-zero in __is_lut_linear() or an out-of-bounds read in\n__drm_lut_to_dc_gamma(). Reject any plane degamma LUT whose size does not\nmatch MAX_COLOR_LUT_ENTRIES, mirroring the invariant the code already\nasserts a few lines below (and which the CRTC path enforces).\n\nThe AMD_PLANE_DEGAMMA_LUT property is only exposed on builds with\nAMD_PRIVATE_COLOR defined.",
  "id": "CVE-2026-89819",
  "modified": "2026-09-18T03:30:22.000225463Z",
  "published": "2026-09-16T10:30:51.898Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b2615b8b54f58bbdf986dffb38cbc35214a5cc5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b10cc09b329245c6d95f8fa3e7f068575e3e0e9f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4c3ab59021e7c146a84b6671f0d530972bd58b4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f6f04d8ae5725bcc893bdc62e3467efd97255c5b"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89819.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89819"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "drm/amd/display: validate plane degamma LUT size for private color prop"
}