CVE-2026-90009
7.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 7b6d3255e7f8c6df2d21504c47808e3ce84649ac < f033530105aa73d82c121d54b57f358e4865d2f4 | affected |
| Linux | Linux | 7b6d3255e7f8c6df2d21504c47808e3ce84649ac < 4b3c5965fca99f62d31c963294bd5b23cc488e97 | affected |
| Linux | Linux | 7.1 | affected |
| Linux | Linux | 0 < 7.1 | unaffected |
| Linux | Linux | 7.2.5 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/f033530105aa73d82c121d54b57f358e4865d2f4
- https://git.kernel.org/stable/c/4b3c5965fca99f62d31c963294bd5b23cc488e97
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