CVE-2026-90009

In the Linux kernel, the following vulnerability has been resolved: scsi: bsg: Fix TOCTOU in io_uring passthrough command setup scsi_bsg_uring_cmd() reads bsg_uring_cmd from the shared mmap'd SQE. Userspace can change a field after we check it and before we use it. request_len is the sharp case: it can grow past sizeof(scmd->cmnd) after the bound check and overflow scmd->cmnd in copy_from_user(). READ_ONCE() the SQE fields we check or use into locals before use.

• https://git.kernel.org/stable/c/4b3c5965fca99f62d31c963294bd5b23cc488e97
• https://git.kernel.org/stable/c/f033530105aa73d82c121d54b57f358e4865d2f4