CVE-2026-90009
scsi: bsg: Fix TOCTOU in io_uring passthrough command setup
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 7.2.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From 7b6d3255e7f8c6df2d21504c47808e3ce84649ac · fixed in f033530105aa73d82c121d54b57f358e4865d2f4; From 7b6d3255e7f8c6df2d21504c47808e3ce84649ac · fixed in 4b3c5965fca99f62d31c963294bd5b23cc488e97
- Linux Linux
7.1
- KernelLinux
From 7.1.0 · fixed in 7.2.5