180 lines
9.8 KiB
JSON
180 lines
9.8 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-2025-38264",
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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": "2025-04-16T04:51:23.997Z",
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"datePublished": "2025-07-09T10:42:38.602Z",
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"dateUpdated": "2026-10-21T12:36:54.626Z"
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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": "2026-10-21T12:36:54.626Z"
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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-tcp: sanitize request list handling\n\nValidate the request in nvme_tcp_handle_r2t() to ensure it's not part of\nany list, otherwise a malicious R2T PDU might inject a loop in request\nlist processing."
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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:H/I:H/A:H",
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"baseScore": 9.8,
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"baseSeverity": "CRITICAL"
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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 - The vulnerable code is the NVMe-over-TCP host driver's PDU receive path, parsing an R2T PDU sent by a remote NVMe-oF target over TCP (port 4420); the malicious input arrives purely over the network from a compromised/rogue target or an on-path attacker.\nAC:L - The target fully controls PDU content and timing — placing two R2T PDUs for the same command_id in a single TCP segment guarantees both are processed inside one nvme_tcp_recv_skb() pass with no send-path progress between them, creating the llist cycle deterministically with no race to win and no memory-layout dependency.\nPR:N - NVMe/TCP requires no authentication by default (TLS and DH-HMAC-CHAP are optional, off in stock configs), so the remote peer needs zero privileges or credentials on the victim host — it simply answers I/O it is already being sent.\nUI:N - No victim action is required; once the host is connected to the target, ordinary filesystem/block I/O generates the in-flight commands and the malicious target triggers the bug on its own by replying with duplicate R2T PDUs.\nS:U - The corruption and the resulting hang are confined to the host kernel's own memory and scheduling authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Beyond the list corruption, duplicate queueing lets the RX path reset req->state/offset/pdu_len while the TX path is consuming the request, desynchronizing req->iter so nvme_tcp_req_cur_page() reads past the bvec array and sock_sendmsg() splices unintended kernel pages directly to the attacker-controlled socket.\nI:H - Attacker-controlled input produces kernel linked-list pointer corruption (double llist_add plus repeated list_add of an already-linked entry into send_list) and lets an in-flight request's PDU header, ttag, and iterator state be rewritten mid-transfer, which is memory/state corruption leverageable for further control over kernel structures.\nA:H - The injected cycle makes nvme_tcp_process_req_list() spin forever in the nvme_tcp_wq kworker while holding queue->send_mutex with no cond_resched(), producing a CPU soft lockup, RCU stalls, and a permanently wedged storage queue — a deterministic, unauthenticated remote kernel hang."
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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/tcp.c"
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],
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"versions": [
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{
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"version": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "8f27d152b2a59f443091cf9e3d815f06e32e9b96",
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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": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "78a4adcd3fedb0728436e8094848ebf4c6bae006",
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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": "3f2304f8c6d6ed97849057bd16fee99e434ca796",
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"lessThan": "f054ea62598197714a6ca7b3b387a027308f8b13",
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"status": "affected",
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{
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"lessThan": "0bf04c874fcb1ae46a863034296e4b33d8fbd66c",
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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/tcp.c"
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],
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"versions": [
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{
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"version": "5.0",
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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": "5.0",
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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": "6.6.160",
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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": "6.12.36",
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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": "6.15.5",
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"lessThanOrEqual": "6.15.*",
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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": "6.16",
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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": "5.0",
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"versionEndExcluding": "6.6.160"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"versionStartIncluding": "5.0",
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{
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"vulnerable": true,
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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/8f27d152b2a59f443091cf9e3d815f06e32e9b96"
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},
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{
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"url": "https://git.kernel.org/stable/c/78a4adcd3fedb0728436e8094848ebf4c6bae006"
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},
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{
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"url": "https://git.kernel.org/stable/c/f054ea62598197714a6ca7b3b387a027308f8b13"
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},
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{
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"url": "https://git.kernel.org/stable/c/0bf04c874fcb1ae46a863034296e4b33d8fbd66c"
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}
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],
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"title": "nvme-tcp: sanitize request list handling",
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"x_generator": {
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} |