138 lines
7.5 KiB
JSON
138 lines
7.5 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-2026-97433",
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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": "2026-09-24T14:53:16.869Z",
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"datePublished": "2026-09-24T16:03:46.169Z",
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"dateUpdated": "2026-09-25T12:44:10.016Z"
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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": "2026-09-25T12:44:10.016Z"
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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: validate FDP configuration descriptor sizes\n\nValidate descriptor sizes while walking the FDP configurations log so\ndsze == 0 or a descriptor past the log end cannot cause unbounded\niteration or reads past the buffer."
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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:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H",
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"baseScore": 8.2,
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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:N - nvme_query_fdp_granularity() walks nvme_fdp_config_desc.dsze from the Get Log Page LID 0x20 (NVME_LOG_FDP_CONFIGS) buffer filled by nvme_get_log_lsi(); on nvme-tcp that payload is C2HData copied by nvme_tcp_recv_data() from the remote NVMe-oF target (TCP 4420), so the malformed descriptor sizes arrive on the wire.\nAC:L - The peer sets Identify ctratt NVME_CTRL_ATTR_FDPS, Get Features FID 0x1d (FDPE and fdpcidx), and log fields sze/dsze, so nvme_query_fdp_granularity() can skip with a crafted dsze to park desc just below end and then load nrg/runs past the kvmalloc object with no race.\nPR:N - The attacker is the NVMe-oF controller. nvme_scan_work() submits that Get Log Page on the existing admin_q; DH-HMAC-CHAP and TLS are optional, and no host uid, capability, or /dev/nvme-fabrics write is required once the session exists.\nUI:N - nvme_start_ctrl() queues ctrl->scan_work and nvme_handle_aen_notice() requeues it on NVME_AER_NOTICE_NS_CHANGED, so nvme_scan_ns()->nvme_update_ns_info_block()->nvme_query_fdp_info()->nvme_query_fdp_granularity() runs on nvme_wq without a further victim mount or click.\nS:U - The over-read is of the host kvmalloc FDP configs log and the info->runs store inside nvme_query_fdp_granularity(); it does not cross a KVM/Xen, IOMMU, or other distinct security authority.\nC:L - After the dsze walk, nvme_query_fdp_granularity() only does le32_to_cpu(desc->nrg) and le64_to_cpu(desc->runs) (offsets 4 and 16). With desc at end-1 that is a strictly bounded 12-byte load past the log object, a small heap leak rather than an arbitrary read.\nI:N - Those fields are stored to info->runs and min()'d into write_stream_granularity in nvme_update_ns_info_block(); the dsze walk performs no out-of-bounds write, use-after-free, or control-flow hijack.\nA:H - hdr.sze is attacker-chosen (capped at PAGE_SIZE*MAX_ORDER_NR_PAGES) for kvmalloc(), and desc->nrg/desc->runs are then loaded without ensuring the selected descriptor fits; that over-read past the allocation can oops when the walk parks desc at the buffer end."
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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/core.c"
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],
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"versions": [
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{
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"version": "30b5f20bb2ddab013035399e5c7e6577da49320a",
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"lessThan": "97efd7a41aac08b43ea2337c5913a2bc75484f9f",
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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": "30b5f20bb2ddab013035399e5c7e6577da49320a",
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"lessThan": "0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8",
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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/core.c"
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],
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"versions": [
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{
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"version": "6.16",
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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": "6.16",
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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": "6.18.53",
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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",
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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": "6.16",
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"versionEndExcluding": "6.18.53"
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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": "6.16",
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"versionEndExcluding": "7.2"
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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/97efd7a41aac08b43ea2337c5913a2bc75484f9f"
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},
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{
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"url": "https://git.kernel.org/stable/c/0ef4daa6534a510d61ea67c8ad9bb5097b0dd5f8"
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}
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],
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"title": "nvme: validate FDP configuration descriptor sizes",
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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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} |