{"id":"CVE-2026-90009","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: bsg: Fix TOCTOU in io_uring passthrough command setup\n\nscsi_bsg_uring_cmd() reads bsg_uring_cmd from the shared mmap'd SQE.\nUserspace can change a field after we …","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: bsg: Fix TOCTOU in io_uring passthrough command setup\n\nscsi_bsg_uring_cmd() reads bsg_uring_cmd from the shared mmap'd SQE.\nUserspace can change a field after we …","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","vendor":"Linux","product":"Linux","affected":["Linux >= 7b6d3255e7f8c6df2d21504c47808e3ce84649ac < f033530105aa73d82c121d54b57f358e4865d2f4","Linux >= 7b6d3255e7f8c6df2d21504c47808e3ce84649ac < 4b3c5965fca99f62d31c963294bd5b23cc488e97","Linux 7.1"],"published":"2026-09-16","updated":"2026-09-16","sourceUpdated":"2026-09-16T15:18:24.553","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90009","references":[{"url":"https://git.kernel.org/stable/c/4b3c5965fca99f62d31c963294bd5b23cc488e97","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f033530105aa73d82c121d54b57f358e4865d2f4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-16T10:53:53.944Z","epss":0.00154,"epssPercentile":0.04908,"slug":"CVE-2026-90009","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nscsi: bsg: Fix TOCTOU in io_uring passthrough command setup\n\nscsi_bsg_uring_cmd() reads bsg_uring_cmd from the shared mmap'd SQE.\nUserspace can change a field after we check it and before we use it.\nrequest_len is the sharp case: it can grow past sizeof(scmd->cmnd) after\nthe bound check and overflow scmd->cmnd in copy_from_user().\n\nREAD_ONCE() the SQE fields we check or use into locals before use.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":205027,"id":"CVE-2026-90009","ts":1789570704844,"field":"cvss","old":null,"new":"7.8"},{"seq":205026,"id":"CVE-2026-90009","ts":1789570704844,"field":"severity","old":"none","new":"high"}]}