CVE-2026-89821

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89821", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.768Z", "datePublished": "2026-09-16T10:30:53.689Z", "dateUpdated": "2026-10-19T08:53:15.267Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:53:15.267Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"], "versions": [{"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "2320626425f3af3a25b8afb6876f205b1c6d4e64", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "d1e06d5dc8f12451ce71dc068342660a34476084", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "c127ace7af2b40107947a6504391f94d6fd21734", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "5f18cd1ba873e751bf5547407ad44ea34adfbe2f", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "ee28fafb50f58b847509b5240b431ddec673bdfe", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "15ee43aad0df43dfd1dbb32e7d5b951745c4b87f", "status": "affected", "versionType": "git"}, {"version": "086247a4b2fba49800b27807f22bb894cd8363fb", "lessThan": "4f40873f8a4107df2b9c8e68c947c4fd0cd519d2", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"], "versions": [{"version": "4.17", "status": "affected"}, {"version": "0", "lessThan": "4.17", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.17", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2320626425f3af3a25b8afb6876f205b1c6d4e64"}, {"url": "https://git.kernel.org/stable/c/d1e06d5dc8f12451ce71dc068342660a34476084"}, {"url": "https://git.kernel.org/stable/c/c127ace7af2b40107947a6504391f94d6fd21734"}, {"url": "https://git.kernel.org/stable/c/4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44"}, {"url": "https://git.kernel.org/stable/c/5f18cd1ba873e751bf5547407ad44ea34adfbe2f"}, {"url": "https://git.kernel.org/stable/c/ee28fafb50f58b847509b5240b431ddec673bdfe"}, {"url": "https://git.kernel.org/stable/c/15ee43aad0df43dfd1dbb32e7d5b951745c4b87f"}, {"url": "https://git.kernel.org/stable/c/4f40873f8a4107df2b9c8e68c947c4fd0cd519d2"}], "title": "drm/amd/display: avoid divide-by-zero in __is_lut_linear()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2320626425f3af3a25b8afb6876f205b1c6d4e64", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "d1e06d5dc8f12451ce71dc068342660a34476084", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "c127ace7af2b40107947a6504391f94d6fd21734", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "5f18cd1ba873e751bf5547407ad44ea34adfbe2f", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "ee28fafb50f58b847509b5240b431ddec673bdfe", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "15ee43aad0df43dfd1dbb32e7d5b951745c4b87f", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}, {"lessThan": "4f40873f8a4107df2b9c8e68c947c4fd0cd519d2", "status": "affected", "version": "086247a4b2fba49800b27807f22bb894cd8363fb", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_color.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.17"}, {"lessThan": "4.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-89821", "lastModified": "2026-10-19T09:18:26.013", "metrics": {}, "published": "2026-09-16T11:16:47.503", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "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"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,2320626425f3af3a25b8afb6876f205b1c6d4e64)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,d1e06d5dc8f12451ce71dc068342660a34476084)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,c127ace7af2b40107947a6504391f94d6fd21734)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,4d5ee095a58461b2446d7a6eb0c14c2fe3eaab44)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,5f18cd1ba873e751bf5547407ad44ea34adfbe2f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,ee28fafb50f58b847509b5240b431ddec673bdfe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,15ee43aad0df43dfd1dbb32e7d5b951745c4b87f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[086247a4b2fba49800b27807f22bb894cd8363fb,4f40873f8a4107df2b9c8e68c947c4fd0cd519d2)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "4.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,4.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.51,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.5,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-18T09:15:06.977304+00:00", "updated": "2026-09-19T13:45:15.180593+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-369"]}