{"id":"CVE-2026-89806","published":"2026-09-16T11:16:45.703","lastModified":"2026-09-16T15:18:10.350","description":"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 (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.","cvssScore":8.4,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/c6f48e59ece0123f6a11527ad4d89b21c2d65b87","tags":[]},{"url":"https://git.kernel.org/stable/c/d9daf9a6e7a6f82ef338a09386eefc6807100d3f","tags":[]},{"url":"https://git.kernel.org/stable/c/ded6ad826fe0fd059333d3a3b3e1742c8e45ff41","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}