{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90227","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.794Z","datePublished":"2026-09-17T16:07:35.989Z","dateUpdated":"2026-09-18T17:53:53.677Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-18T17:53:53.677Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed()\n\nUnlike IO_CMD / IO64_CMD, NVME_IOCTL_SUBMIT_IO never calls\nnvme_cmd_allowed(). Unprivileged callers can thus issue I/O on a\npartition device or write through a read-only file descriptor.\n\nPass flags and open_for_write through and reject disallowed commands\nwith -EACCES."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - Attacker-controlled opcode/slba/nblocks enter via copy_from_user of struct nvme_user_io in nvme_submit_io(), reached only through ioctl(NVME_IOCTL_SUBMIT_IO) on an NVMe block or ng* char node (blkdev_ioctl → nvme_ioctl / nvme_ns_chr_ioctl → nvme_ns_ioctl). No remote protocol carries that payload.\nAC:L - nvme_submit_io() copies the user nvme_user_io, accepts nvme_cmd_read/write/compare, and submits with the caller-chosen io.slba; there is no race or layout dependency, so the same ioctl reliably performs the I/O.\nPR:L - nvme_open()/nvme_ns_chr_open() impose no capability check, and the vulnerable nvme_submit_io() path never called nvme_cmd_allowed(), the only CAP_SYS_ADMIN gate for partition and read-only-fd I/O. An unprivileged user who can open a partition or O_RDONLY NVMe node can issue the ioctl.\nUI:N - The attacker opens the NVMe node they already control and issues NVME_IOCTL_SUBMIT_IO themselves; no other user must mount media, pass a file, or otherwise act.\nS:U - Skipping nvme_cmd_allowed() lets the caller read and write other LBAs of the same NVMe namespace in the host kernel. That is intra-OS partition/fd-mode bypass, not a VM, IOMMU, or guest-to-host boundary crossing.\nC:H - On a partition bdev, nvme_ioctl() still uses bdev->bd_disk->private_data (the whole namespace) and nvme_submit_io() programs c.rw.slba from attacker io.slba without adding bd_start_sect, so nvme_cmd_read returns arbitrary namespace LBAs including other partitions.\nI:H - The same path accepts io.opcode=nvme_cmd_write and, because nvme_cmd_allowed() is not called, ignores NVME_IOCTL_PARTITION and !open_for_write, so the attacker can persist writes to any namespace LBA from a partition fd or an O_RDONLY descriptor.\nA:H - Those unscoped nvme_cmd_write commands can overwrite other partitions' metadata, swap, or the OS image on the same namespace, persistently denying use of the host or co-tenant volumes (the failure mode nvme_cmd_allowed() exists to prevent)."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/ioctl.c"],"versions":[{"version":"a53295b6998f62d961c29e54051c1cf1d738c2b3","lessThan":"c35cd98eed1a863e8dd51073953563cd8c907f68","status":"affected","versionType":"git"},{"version":"a53295b6998f62d961c29e54051c1cf1d738c2b3","lessThan":"95b0591d51dbf9e618d7845883d535e88ad7c8af","status":"affected","versionType":"git"},{"version":"a53295b6998f62d961c29e54051c1cf1d738c2b3","lessThan":"736b7c6adc7a65c4411beff197b6a634f7a6ca27","status":"affected","versionType":"git"},{"version":"a53295b6998f62d961c29e54051c1cf1d738c2b3","lessThan":"b116e9dae433ff631f94c36c61a7a78fe400ed1e","status":"affected","versionType":"git"},{"version":"a53295b6998f62d961c29e54051c1cf1d738c2b3","lessThan":"b53d495c7f0db46b6748b5ade48371a10dd5d3bc","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/nvme/host/ioctl.c"],"versions":[{"version":"3.3","status":"affected"},{"version":"0","lessThan":"3.3","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.52","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.6","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.3","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c35cd98eed1a863e8dd51073953563cd8c907f68"},{"url":"https://git.kernel.org/stable/c/95b0591d51dbf9e618d7845883d535e88ad7c8af"},{"url":"https://git.kernel.org/stable/c/736b7c6adc7a65c4411beff197b6a634f7a6ca27"},{"url":"https://git.kernel.org/stable/c/b116e9dae433ff631f94c36c61a7a78fe400ed1e"},{"url":"https://git.kernel.org/stable/c/b53d495c7f0db46b6748b5ade48371a10dd5d3bc"}],"title":"nvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed()","x_generator":{"engine":"bippy-1.2.0"}}}}