201 lines
11 KiB
JSON
201 lines
11 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-90227",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-09-11T19:38:34.794Z",
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"datePublished": "2026-09-17T16:07:35.989Z",
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"dateUpdated": "2026-10-19T09:00:03.749Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-10-19T09:00:03.749Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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)."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/nvme/host/ioctl.c"
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],
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"versions": [
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{
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"version": "a53295b6998f62d961c29e54051c1cf1d738c2b3",
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"lessThan": "c35cd98eed1a863e8dd51073953563cd8c907f68",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a53295b6998f62d961c29e54051c1cf1d738c2b3",
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"lessThan": "95b0591d51dbf9e618d7845883d535e88ad7c8af",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a53295b6998f62d961c29e54051c1cf1d738c2b3",
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"lessThan": "736b7c6adc7a65c4411beff197b6a634f7a6ca27",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a53295b6998f62d961c29e54051c1cf1d738c2b3",
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"lessThan": "b116e9dae433ff631f94c36c61a7a78fe400ed1e",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "a53295b6998f62d961c29e54051c1cf1d738c2b3",
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"lessThan": "b53d495c7f0db46b6748b5ade48371a10dd5d3bc",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/nvme/host/ioctl.c"
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],
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"versions": [
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{
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"version": "3.3",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "3.3",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.157",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.110",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.52",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2.6",
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"lessThanOrEqual": "7.2.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.3",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.6.157"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.12.110"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "6.18.52"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "7.2.6"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "3.3",
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"versionEndExcluding": "7.3"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/c35cd98eed1a863e8dd51073953563cd8c907f68"
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},
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{
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"url": "https://git.kernel.org/stable/c/95b0591d51dbf9e618d7845883d535e88ad7c8af"
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},
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{
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"url": "https://git.kernel.org/stable/c/736b7c6adc7a65c4411beff197b6a634f7a6ca27"
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},
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{
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"url": "https://git.kernel.org/stable/c/b116e9dae433ff631f94c36c61a7a78fe400ed1e"
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},
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{
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"url": "https://git.kernel.org/stable/c/b53d495c7f0db46b6748b5ade48371a10dd5d3bc"
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}
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],
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"title": "nvme/ioctl: check SUBMIT_IO with nvme_cmd_allowed()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |