CVE-2026-90009scsi: bsg: Fix TOCTOU in io_uring passthrough command setup
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 7b6d3255e7f8c6df2d21504c47808e3ce84649ac before f033530105aa73d82c121d54b57f358e4865d2f4; 7b6d3255e7f8c6df2d21504c47808e3ce84649ac builds before 4b3c5965fca99f62d31c963294bd5b23cc488e97 | CNA record |
References
- https://git.kernel.org/stable/c/f033530105aa73d82c121d54b57f358e4865d2f4
- https://git.kernel.org/stable/c/4b3c5965fca99f62d31c963294bd5b23cc488e97
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.