264 lines
14 KiB
JSON
264 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-2026-93037",
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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": "2026-09-17T15:57:05.656Z",
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"datePublished": "2026-09-17T16:10:31.452Z",
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"dateUpdated": "2026-10-19T09:04:32.386Z"
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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": "2026-10-19T09:04:32.386Z"
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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\nRDMA/hfi1: Propagate sdma_txinit_ahg() errors\n\nset_txreq_header_ahg() ignores the return value of sdma_txinit_ahg().\n\nIf sdma_txinit_ahg() fails, it returns before initializing tx->txreq.\nHowever, set_txreq_header_ahg() ignores the error and returns the AHG\nchange count, causing the caller to continue processing the request as\nthough initialization had succeeded.\n\nPropagate sdma_txinit_ahg() failures to the caller and abort request\nprocessing when initialization fails.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE."
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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 - The attacker-controlled bytes are the sdma_req_info/header/iovecs copy_from_user()'d in hfi1_user_sdma_process_request(), reached only from hfi1_write_iter() on the hfi1 user cdev. A remote Omni-Path peer does not supply that request; kernel verbs already check sdma_txinit_ahg() and are not this bug.\nAC:L - On the AHG path (npkts>1 and HFI1_CAP_IS_USET(SDMA_AHG) so ahg_idx>=0), the attacker sets a later packet's datalen to 0 or info.fragsize>MAX_SDMA_PKT_SIZE so sdma_txinit_ahg() returns -ENODATA/-EMSGSIZE. set_txreq_header_ahg() still returns the AHG index count, and user_sdma_send_pkts() continues with no race.\nPR:L - hfi1_user_devnode() creates /dev/hfi1_N with mode 0666, and hfi1_file_open()/assign_ctxt() perform no capability checks, so an ordinary unprivileged local user can assign a context and writev() the crafted SDMA request.\nUI:N - Exploitation is the attacker's own open, HFI1_IOCTL_ASSIGN_CTXT, and writev() of a multi-packet user SDMA request; no other user must mount media, open a file, or otherwise interact.\nS:U - The uninitialized user_sdma_txreq.txreq is consumed by make_tx_sdma_desc() and submit_tx() inside the host hfi1 driver; impact is host-kernel memory/DMA corruption, not a guest-to-host, IOMMU, or other authority-boundary escape.\nC:H - user_sdma_send_pkts() still calls hfi1_add_pages_to_sdma_packet() after the failed sdma_txinit_ahg(), and make_tx_sdma_desc() reads/writes through uninitialized tx->descp. A recycled txreq_cache object whose extended descp was kfree'd in __sdma_txclean() is a use-after-free, enabling kernel info disclosure.\nI:H - make_tx_sdma_desc() writes DMA address and length through that uninitialized/dangling descp, and submit_tx() copies those descriptors into the SDMA ring. That is an arbitrary kernel write and hardware DMA of attacker-influenced descriptors, enabling control-flow hijack.\nA:H - submit_tx() always loads descp->qw[0] even when num_desc is 0, so a NULL descp from an uninitialized txreq is a kernel NULL-deref oops; garbage num_desc/descriptors also crash or halt the SDMA engine."
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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/infiniband/hw/hfi1/user_sdma.c"
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],
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"versions": [
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{
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"version": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "122a730675565ff2ad210537c3fc3afb8291d482",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "bf974994150cfd14bfc599748925f4d426e00d90",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "5b7cefffd15d87c8103865f887cdcf9077d8094b",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "3416db552eb378e54cb2f2ce0db5f0df88654bda",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "ca99431820e8cac19f6a091c04da54cbe8d64f52",
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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": "e3304b7cc4f14d365f46d6847a35563ae8b017f7",
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"lessThan": "091c6162c022cbdfb64219708a71728cfd1d4600",
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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/infiniband/hw/hfi1/user_sdma.c"
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],
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"versions": [
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{
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"version": "4.14",
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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": "4.14",
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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": "5.10.270",
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"lessThanOrEqual": "5.10.*",
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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": "5.15.221",
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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": "6.1.188",
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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": "6.6.157",
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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": "4.14",
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"versionEndExcluding": "5.10.270"
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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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/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e"
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},
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{
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"url": "https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482"
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},
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{
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"url": "https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90"
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},
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{
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"url": "https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9"
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},
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{
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"url": "https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b"
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},
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{
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"url": "https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52"
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},
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{
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"url": "https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600"
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}
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],
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"title": "RDMA/hfi1: Propagate sdma_txinit_ahg() errors",
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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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} |