{"id":"CVE-2026-74449","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix divide-by-zero in calculate_mcache_setting on zero viewport\n\nIf a plane reaches calculate_mcache_setting with a zero-area viewport,\ncalculate_mcach…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix divide-by-zero in calculate_mcache_setting on zero viewport\n\nIf a plane reaches calculate_mcache_setting with a zero-area viewport,\ncalculate_mcach…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 70839da6360500a82e4d5f78499284474cbed7c1 < 23a541c31b45fa813b33269376f6bd53535429a8","Linux >= 70839da6360500a82e4d5f78499284474cbed7c1 < 1f93537881fd22712732a60ad12572a3fd40c0ec","Linux >= 70839da6360500a82e4d5f78499284474cbed7c1 < f327e389c07cfc3a2f6ff54f6214e1a52d457edc","Linux 6.11"],"published":"2026-08-15","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:17:46.273","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74449","references":[{"url":"https://git.kernel.org/stable/c/1f93537881fd22712732a60ad12572a3fd40c0ec","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/23a541c31b45fa813b33269376f6bd53535429a8","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f327e389c07cfc3a2f6ff54f6214e1a52d457edc","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"epss":0.00165,"epssPercentile":0.05348,"ingestedAt":"2026-10-15T11:00:41.676Z","slug":"CVE-2026-74449","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/display: Fix divide-by-zero in calculate_mcache_setting on zero viewport\n\nIf a plane reaches calculate_mcache_setting with a zero-area viewport,\ncalculate_mcache_setting exits early with num_mcaches == 0 and\nmvmpg_width/height == 0. This will cause a divide-by-zero panic and can\nalso cause an underflow on num_mcaches.\n\nFix this by changing calculate_mcache_setting to bool and adding guards\nafter each calculate_mcache_row_bytes call. If num_mcaches or\nmvmpg_width/height is zero, return a false. Callers will propagate the\nfailure as a rejected mode, which prevents the panic.\n\n(cherry picked from commit 29c0f7c655f47bcbd575ff75e58480df6ec3c9da)\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}