CVE-2026-90009
scsi: bsg: Fix TOCTOU in io_uring passthrough command setup
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 16, 2026 |
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Affected Versions
Linux / Linux
7b6d3255e7f8c6df2d21504c47808e3ce84649ac < f033530105aa73d82c121d54b57f358e4865d2f4 7b6d3255e7f8c6df2d21504c47808e3ce84649ac < 4b3c5965fca99f62d31c963294bd5b23cc488e97
Linux / Linux
7.1