CVE-2026-90009 scsi: bsg: Fix TOCTOU in io_uring passthrough command setup

In the Linux kernel, the following vulnerability has been resolved: scsi: bsg: Fix TOCTOU in iouring passthrough command setup scsibsguringcmd reads bsguringcmd from the shared mmap'd SQE. Userspace can change a field after we check it and before we use it. requestlen is the sharp case: it can gr...

CVE-2026-90009

CVE-2026-90009 is a TOCTOU (time-of-check to time-of-use) race condition in the Linux kernel's scsi: bsg subsystem, specifically in scsi_bsg_uring_cmd() during io_uring passthrough command setup. The function reads bsg_uring_cmd fields from a shared mmap'd SQE; a local attacker with low privilege...