CVE-2026-90324

In the Linux kernel, the following vulnerability has been resolved: ublk: check import_ubuf() return value import_ubuf() can fail if the address range (provided by the userspace ublk server) is outside the allowed user address space. Return that 0 bytes were copied if import_ubuf() fails rather than passing an uninitialized struct iov_iter to ublk_copy_user_pages().

• https://git.kernel.org/stable/c/0121c84adb6a4cd6f7560b5895bd88f9899bbc1f
• https://git.kernel.org/stable/c/3831568792af75b6523fa93bb91560e29189cf55
• https://git.kernel.org/stable/c/5ac6019cb78e98c9608fda72726b36ddf8474dd7