{"apiVersion":"1.0","identifier":"CVE-2026-74449","description":"In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix divide-by-zero in calculate_mcache_setting on zero viewport If a plane reaches calculate_mcache_setting with a zero-area viewport, calculate_mcache_setting exits early with num_mcaches == 0 and mvmpg_width/height == 0. This will cause a divide-by-zero panic and can also cause an underflow on num_mcaches. Fix this by changing calculate_mcache_setting to bool and adding guards after each calculate_mcache_row_bytes call. If num_mcaches or mvmpg_width/height is zero, return a false. Callers will propagate the failure as a rejected mode, which prevents the panic. (cherry picked from commit 29c0f7c655f47bcbd575ff75e58480df6ec3c9da)","publishedAt":"2026-08-15T13:17:49","lastModifiedAt":"2026-08-18T07:16:54","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74449","cvssScore":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","epssProbability":0.0012,"riskScore":0.79,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74449","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74449","en":"https://www.redsauce.net/en/cves/CVE-2026-74449","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74449","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74449","de":"https://www.redsauce.net/de/cves/CVE-2026-74449","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74449","el":"https://www.redsauce.net/el/cves/CVE-2026-74449"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74449"}}