The article explains how attackers exploit a vulnerable signed driver (BYOVD) to obtain a kernel read/write primitive. It shows how unsafe IOCTL handlers allow manipulating kernel memory and abusing driver functionality for offensive operations.
Using ReadFile with Handle of Opened .blf Log File Produces an Unrecoverable State in CLFS.sys Causing a BSoD
CVE-2026-2636 Logic bug in Windows’ CLFS driver: calling ReadFile on a .blf log handle pushes CLFS.sys into an unrecoverable state and triggers an immediate BSoD — local DoS with only user privileges.