CVE-2026-63826

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description A use-after-free issue exists in the store modes() function within the fbdev component. The function replaces a framebuffer modelist with modes from userspace and frees the old list using fb destroy modelist(), but fails to clear pointers that still reference the freed memory. Specifically, the fb display[i].mode pointer may remain stale if a console is unmapped, leading to a use-after-free when fbcon mode deleted() reads it via fb mode is equal(). Additionally, the fb info->mode pointer is not updated, causing a use-after-free when show mode() dereferences it through mode string().

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.