276 lines
14 KiB
JSON
276 lines
14 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-2024-41079",
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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": "2024-07-12T12:17:45.632Z",
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"datePublished": "2024-07-29T15:04:16.733Z",
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"dateUpdated": "2026-08-05T11:35:14.304Z"
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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": "2026-08-05T11:35:14.304Z"
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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\nnvmet: always initialize cqe.result\n\nThe spec doesn't mandate that the first two double words (aka results)\nfor the command queue entry need to be set to 0 when they are not\nused (not specified). Though, the target implemention returns 0 for TCP\nand FC but not for RDMA.\n\nLet's make RDMA behave the same and thus explicitly initializing the\nresult field. This prevents leaking any data from the stack."
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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:N/A:N",
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"baseScore": 7.5,
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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 - nvmet is the in-kernel NVMe-over-Fabrics target; the leaked CQE is delivered to a remote initiator over RDMA (RoCEv2 over UDP/IP, iWARP over TCP, and soft-RoCE/siw over ordinary Ethernet are all IP-routable) on the standard NVMe-oF port. The defect itself is in transport-generic `nvmet_req_init()`, and NVMe-oF targets are explicitly network-facing services.\nAC:L - The leak is fully deterministic — establish an RDMA CM connection and send any command capsule, and the uninitialized 8-byte result field is returned every time. There is no race, no timing window, and no memory-layout precondition required to obtain the disclosure.\nPR:N - The response buffers are allocated directly from the RDMA CM connect request, and any command sent before Connect completes (`req->sq->ctrl == NULL`) is rejected by `nvmet_parse_connect_cmd()` and completed with the uninitialized CQE — no host NQN validation, no DH-HMAC-CHAP authentication, and no valid NVMe Connect is needed. This is a purely pre-authentication code path.\nUI:N - Exploitation requires only that the attacker connect to the exported NVMe-oF target and issue commands; no action by any local user or administrator is involved.\nS:U - The disclosed data and the vulnerable code are both within the target kernel's security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Each response leaks 8 bytes of uninitialized kmalloc-16 slab memory, and the attacker controls the volume without bound — `hsqsize` is uncapped for I/O queues (up to ~131072 fresh CQEs per queue) and `nvmet_rdma_get_rsp()` allocates and frees a brand-new CQE per in-flight command past the free list, giving a repeatable spray-and-harvest oracle over recently-freed heap objects that readily yields kernel pointers and other sensitive residue.\nI:N - The bug only causes stale, non-attacker-chosen bytes to be emitted in the completion entry; no kernel data structure, file content, or target state is modified as a result.\nA:N - Reading uninitialized memory within a validly allocated 16-byte object causes no crash, hang, or resource exhaustion — the target continues operating normally while leaking."
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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/target/core.c",
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"drivers/nvme/target/fabrics-cmd-auth.c",
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"drivers/nvme/target/fabrics-cmd.c"
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],
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"versions": [
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{
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"version": "a07b4970f464f13640e28e16dad6cfa33647cc99",
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"lessThan": "c6a2cf8b0764f3ba7d9bff58c8775a6d4476bb29",
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"status": "affected",
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"status": "affected",
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"status": "affected",
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"lessThan": "cd0c1b8e045a8d2785342b385cb2684d9b48e426",
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"status": "affected",
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{
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"product": "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/target/core.c",
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"drivers/nvme/target/fabrics-cmd-auth.c",
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"drivers/nvme/target/fabrics-cmd.c"
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],
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"versions": [
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{
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"version": "4.8",
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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": "4.8",
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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": "5.15.209",
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"lessThanOrEqual": "5.15.*",
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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": "6.1.101",
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"lessThanOrEqual": "6.1.*",
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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": "6.6.42",
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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": "6.9.11",
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"lessThanOrEqual": "6.9.*",
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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": "6.10",
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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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"id": "CVE-2024-41079",
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"role": "CISA Coordinator",
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"options": [
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