Answer in brief
CVE-2026-90009 records a High severity (CVSS 7.8) vulnerability in scsi: bsg: Fix TOCTOU in io_uring passthrough command setup. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=7b6d3255e7f8c6df2d21504c47808e3ce84649ac <f033530105aa73d82c121d54b57f358e4865d2f4 || >=7b6d3255e7f8c6df2d21504c47808e3ce84649ac <4b3c5965fca99f62d31c963294bd5b23cc488e97 | f033530105aa73d82c121d54b57f358e4865d2f4, 4b3c5965fca99f62d31c963294bd5b23cc488e97 |
| Linux/Linuxgeneric | 7.1 | Not reported |
Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.