CVE-2026-90189

In the Linux kernel, the following vulnerability has been resolved: nullblk: register configfs subsystem after creating default devices In nullinit, configfsregistersubsystem currently runs before registerblkdev, so when nullblk is built as a module, a racing mkdir + poweron from userspace can...

CVE-2026-90190: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: nullblk: use DEFINEMUTEX for the file-scope mutex In nullinit, mutexinit&lock currently happens after configfsregistersubsystem, which exposes the nullb subsystem to userspace. A racing mkdir into /sys/kernel/config/nullb/ can...

CVE-2022-48931

In the Linux kernel, the following vulnerability has been resolved: configfs: fix a race in configfs,unregistersubsystem When configfsregistersubsystem or configfsunregistersubsystem is executing linkgroup or unlinkgroup, it is possible that two processes add or delete list concurrently. Some...