{"id":"CVE-2026-89819","revision":"f47e336947ae46ac9b408770e93d5f0c","records":[{"revision":"f47e336947ae46ac9b408770e93d5f0c","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89819","aliases":[],"title":"drm/amd/display: validate plane degamma LUT size for private color prop","description":"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() -> __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.","state":0,"publishedAt":"2026-09-16T10:30:51.898+00:00","modifiedAt":"2026-10-19T08:53:13.333+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\": \"980f8710075acaeb226a94cde6dda8ffad30123c\",\n                            \"lessThan\": \"f6f04d8ae5725bcc893bdc62e3467efd97255c5b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"980f8710075acaeb226a94cde6dda8ffad30123c\",\n                            \"lessThan\": \"0b2615b8b54f58bbdf986dffb38cbc35214a5cc5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"980f8710075acaeb226a94cde6dda8ffad30123c\",\n                            \"lessThan\": \"b10cc09b329245c6d95f8fa3e7f068575e3e0e9f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"980f8710075acaeb226a94cde6dda8ffad30123c\",\n                            \"lessThan\": \"e4c3ab59021e7c146a84b6671f0d530972bd58b4\",\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\": \"6.8\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.8\",\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":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/f6f04d8ae5725bcc893bdc62e3467efd97255c5b","https://git.kernel.org/stable/c/0b2615b8b54f58bbdf986dffb38cbc35214a5cc5","https://git.kernel.org/stable/c/b10cc09b329245c6d95f8fa3e7f068575e3e0e9f","https://git.kernel.org/stable/c/e4c3ab59021e7c146a84b6671f0d530972bd58b4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89819","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89819","identifiers":["CVE-2026-89819"]},"retained":false,"historicalAffected":[]}],"coverage":[]}