{"id":"CVE-2026-89821","title":"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 …","summary":"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 …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < 2320626425f3af3a25b8afb6876f205b1c6d4e64","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < d1e06d5dc8f12451ce71dc068342660a34476084","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < c127ace7af2b40107947a6504391f94d6fd21734","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < 4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < 5f18cd1ba873e751bf5547407ad44ea34adfbe2f","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < ee28fafb50f58b847509b5240b431ddec673bdfe","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < 15ee43aad0df43dfd1dbb32e7d5b951745c4b87f","Linux >= 086247a4b2fba49800b27807f22bb894cd8363fb < 4f40873f8a4107df2b9c8e68c947c4fd0cd519d2","Linux 4.17"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T11:16:47.503","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89821","references":[{"url":"https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:54.003Z","epss":0.00211,"epssPercentile":0.10037,"slug":"CVE-2026-89821","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}