{"id":"CVE-2026-89821","revision":"fd4c311340e8434cb642ab4983bd2215","records":[{"revision":"fd4c311340e8434cb642ab4983bd2215","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89821","aliases":[],"title":"drm/amd/display: avoid divide-by-zero in __is_lut_linear()","description":"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.","state":0,"publishedAt":"2026-09-16T10:30:53.689+00:00","modifiedAt":"2026-10-19T08:53:15.267+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"2320626425f3af3a25b8afb6876f205b1c6d4e64\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"d1e06d5dc8f12451ce71dc068342660a34476084\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"c127ace7af2b40107947a6504391f94d6fd21734\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"5f18cd1ba873e751bf5547407ad44ea34adfbe2f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"ee28fafb50f58b847509b5240b431ddec673bdfe\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"15ee43aad0df43dfd1dbb32e7d5b951745c4b87f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"086247a4b2fba49800b27807f22bb894cd8363fb\",\n                            \"lessThan\": \"4f40873f8a4107df2b9c8e68c947c4fd0cd519d2\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.17\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.17\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.270\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.221\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.188\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.157\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.110\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.5\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64","https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084","https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734","https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44","https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f","https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe","https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f","https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89821","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89821","identifiers":["CVE-2026-89821"]},"retained":false,"historicalAffected":[]}],"coverage":[]}