CVE-2026-43364

A flaw was found in the Linux kernel's ublk subsystem. A local user can trigger a NULL pointer dereference by sending an UPDATESIZE command to a ublk device that has been added but not yet started, or one that has been stopped. This occurs due to insufficient state validation before dereferencing...

CVE-2026-43364 ublk: fix NULL pointer dereference in ublk_ctrl_set_size()

In the Linux kernel, the following vulnerability has been resolved: ublk: fix NULL pointer dereference in ublkctrlsetsize ublkctrlsetsize unconditionally dereferences ub-ubdisk via setcapacityandnotify without checking if it is NULL. ub-ubdisk is NULL before UBLKCMDSTARTDEV completes it is only...