{"id":24506,"date":"2026-09-16T20:32:24","date_gmt":"2026-09-16T12:32:24","guid":{"rendered":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89819"},"modified":"2026-09-16T20:32:24","modified_gmt":"2026-09-16T12:32:24","slug":"cve-2026-89819","status":"publish","type":"vuln","link":"https:\/\/www.54iter.cn\/?vuln=cve-2026-89819","title":{"rendered":"CVE-2026-89819 &#8211; In the Linux kernel, the following vulnerability has been resolved:\n\ndrm\/amd\/display: vali"},"content":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>drm\/amd\/display: validate plane degamma LUT size for private color prop<\/p>\n<p>Unlike the CRTC degamma path, which is guarded by<br \/>\namdgpu_dm_verify_lut_sizes(), the per-plane degamma LUT size was never<br \/>\nvalidated before use. __set_dm_plane_degamma() passed the user-supplied<br \/>\nsize straight into __is_lut_linear() and, for a non-linear LUT, into<br \/>\n__set_input_tf() -&gt; __drm_lut_to_dc_gamma(), the latter always iterating<br \/>\nMAX_COLOR_LUT_ENTRIES entries regardless of the actual LUT size.<\/p>\n<p>A malformed AMD_PLANE_DEGAMMA_LUT blob (e.g. a single entry) could thus<br \/>\ntrigger a divide-by-zero in __is_lut_linear() or an out-of-bounds read in<br \/>\n__drm_lut_to_dc_gamma(). Reject any plane degamma LUT whose size does not<br \/>\nmatch MAX_COLOR_LUT_ENTRIES, mirroring the invariant the code already<br \/>\nasserts a few lines below (and which the CRTC path enforces).<\/p>\n<p>The AMD_PLANE_DEGAMMA_LUT property is only exposed on builds with<br \/>\nAMD_PRIVATE_COLOR defined.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In the Linux kernel, the following vulnerability has been resolved:<\/p>\n<p>drm\/amd\/display: validate plane degamma LUT size for private color prop<\/p>\n<p>Unlike the CRTC degamma path, which is guarded by<br \/>\namdgpu_d<\/p>\n","protected":false},"template":"","meta":[],"categories":[],"tags":[],"class_list":["post-24506","vuln","type-vuln","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln\/24506","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/vuln"}],"about":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=\/wp\/v2\/types\/vuln"}],"wp:attachment":[{"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=24506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=24506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.54iter.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=24506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}