fbdev: tdfxfb: avoid divide-by-zero on FBIOPUT_VSCREENINFO

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CVE-2026-31618

A flaw was found in the Linux kernel's fbdev subsystem, specifically affecting the tdfxfb and udlfb drivers. This vulnerability allows a local attacker to trigger a divide-by-zero error when performing the FBIOPUTVSCREENINFO operation. This can lead to a system crash, resulting in a Denial of...

CVE-2026-31618

CVE-2026-31618 affects the Linux kernel fbdev subsystem, specifically the tdfxfb and udlfb drivers. The issue is a divide-by-zero crash in FBIOPUT_VSCREENINFO when the code uses pixclock for division, which can crash the system and lead to a DoS condition as described in the advisory. A fix has b...