{"id":"CVE-2026-89806","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sysfb: ofdrm: Fix integer overflow in fb_size calculation\n\nThe framebuffer size calculation `fb_size = linebytes * height` can\noverflow when both values are large (…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sysfb: ofdrm: Fix integer overflow in fb_size calculation\n\nThe framebuffer size calculation `fb_size = linebytes * height` can\noverflow when both values are large (…","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 < ded6ad826fe0fd059333d3a3b3e1742c8e45ff41","Linux >= c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 < d9daf9a6e7a6f82ef338a09386eefc6807100d3f","Linux >= c8a17756c42581ba1a567d1dd3b69e8f5619a7d8 < c6f48e59ece0123f6a11527ad4d89b21c2d65b87","Linux 6.2"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:10.350","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-89806","references":[{"url":"https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:54.005Z","epss":0.00178,"epssPercentile":0.07618,"slug":"CVE-2026-89806","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/sysfb: ofdrm: Fix integer overflow in fb_size calculation\n\nThe framebuffer size calculation `fb_size = linebytes * height` can\noverflow when both values are large (e.g., 46341 * 46341 > INT_MAX).\nSince linebytes and height are both int types, the multiplication is\nperformed as int * int, which results in undefined behavior on overflow.\n\nUse check_mul_overflow() to detect and prevent this overflow, consistent\nwith the approach used in simpledrm.c and corebootdrm.c.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205239,"id":"CVE-2026-89806","ts":1789570705881,"field":"cvss","old":null,"new":"8.4"},{"seq":205238,"id":"CVE-2026-89806","ts":1789570705881,"field":"severity","old":"none","new":"high"}]}