{"api_version":"1","generated_at":"2026-09-28T15:32:33+00:00","cve":"CVE-2026-93037","urls":{"html":"https://cve.report/CVE-2026-93037","api":"https://cve.report/api/cve/CVE-2026-93037.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93037","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93037"},"summary":{"title":"RDMA/hfi1: Propagate sdma_txinit_ahg() errors","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:56","updated_at":"2026-09-18 18:18:18"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda","name":"https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600","name":"https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9","name":"https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90","name":"https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482","name":"https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b","name":"https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e","name":"https://git.kernel.org/stable/c/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52","name":"https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93037","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93037","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e3304b7cc4f14d365f46d6847a35563ae8b017f7 cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e3304b7cc4f14d365f46d6847a35563ae8b017f7 122a730675565ff2ad210537c3fc3afb8291d482 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e3304b7cc4f14d365f46d6847a35563ae8b017f7 bf974994150cfd14bfc599748925f4d426e00d90 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected e3304b7cc4f14d365f46d6847a35563ae8b017f7 fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93037","cve":"CVE-2026-93037","epss":"0.001640000","percentile":"0.060160000","score_date":"2026-09-21","updated_at":"2026-09-22 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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."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"scenarios":[{"lang":"en","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."}]}],"providerMetadata":{"dateUpdated":"2026-09-18T17:55:40.342Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/cb73c2fe6e9cf563c99f22b7c8bca0d5f70d603e"},{"url":"https://git.kernel.org/stable/c/122a730675565ff2ad210537c3fc3afb8291d482"},{"url":"https://git.kernel.org/stable/c/bf974994150cfd14bfc599748925f4d426e00d90"},{"url":"https://git.kernel.org/stable/c/fd6dee13f3857259b6b2ddd28e1ed95fd94ae2f9"},{"url":"https://git.kernel.org/stable/c/5b7cefffd15d87c8103865f887cdcf9077d8094b"},{"url":"https://git.kernel.org/stable/c/3416db552eb378e54cb2f2ce0db5f0df88654bda"},{"url":"https://git.kernel.org/stable/c/ca99431820e8cac19f6a091c04da54cbe8d64f52"},{"url":"https://git.kernel.org/stable/c/091c6162c022cbdfb64219708a71728cfd1d4600"}],"title":"RDMA/hfi1: Propagate sdma_txinit_ahg() errors","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93037","datePublished":"2026-09-17T16:10:31.452Z","dateReserved":"2026-09-17T15:57:05.656Z","dateUpdated":"2026-09-18T17:55:40.342Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:56","lastModifiedDate":"2026-09-18 18:18:18","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93037","Ordinal":"1","Title":"RDMA/hfi1: Propagate sdma_txinit_ahg() errors","CVE":"CVE-2026-93037","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93037","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"RDMA/hfi1: Propagate sdma_txinit_ahg() errors"}]}}}