{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-47696", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-09-30T16:00:12.942Z", "datePublished": "2024-10-21T11:53:33.950Z", "dateUpdated": "2026-08-05T11:39:29.355Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:39:29.355Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/iwcm: Fix WARNING:at_kernel/workqueue.c:#check_flush_dependency\n\nIn the commit aee2424246f9 (\"RDMA/iwcm: Fix a use-after-free related to\ndestroying CM IDs\"), the function flush_workqueue is invoked to flush the\nwork queue iwcm_wq.\n\nBut at that time, the work queue iwcm_wq was created via the function\nalloc_ordered_workqueue without the flag WQ_MEM_RECLAIM.\n\nBecause the current process is trying to flush the whole iwcm_wq, if\niwcm_wq doesn't have the flag WQ_MEM_RECLAIM, verify that the current\nprocess is not reclaiming memory or running on a workqueue which doesn't\nhave the flag WQ_MEM_RECLAIM as that can break forward-progress guarantee\nleading to a deadlock.\n\nThe call trace is as below:\n\n[ 125.350876][ T1430] Call Trace:\n[ 125.356281][ T1430] \n[ 125.361285][ T1430] ? __warn (kernel/panic.c:693)\n[ 125.367640][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9))\n[ 125.375689][ T1430] ? report_bug (lib/bug.c:180 lib/bug.c:219)\n[ 125.382505][ T1430] ? handle_bug (arch/x86/kernel/traps.c:239)\n[ 125.388987][ T1430] ? exc_invalid_op (arch/x86/kernel/traps.c:260 (discriminator 1))\n[ 125.395831][ T1430] ? asm_exc_invalid_op (arch/x86/include/asm/idtentry.h:621)\n[ 125.403125][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9))\n[ 125.410984][ T1430] ? check_flush_dependency (kernel/workqueue.c:3706 (discriminator 9))\n[ 125.418764][ T1430] __flush_workqueue (kernel/workqueue.c:3970)\n[ 125.426021][ T1430] ? __pfx___might_resched (kernel/sched/core.c:10151)\n[ 125.433431][ T1430] ? destroy_cm_id (drivers/infiniband/core/iwcm.c:375) iw_cm\n[ 125.441209][ T1430] ? __pfx___flush_workqueue (kernel/workqueue.c:3910)\n[ 125.473900][ T1430] ? _raw_spin_lock_irqsave (arch/x86/include/asm/atomic.h:107 include/linux/atomic/atomic-arch-fallback.h:2170 include/linux/atomic/atomic-instrumented.h:1302 include/asm-generic/qspinlock.h:111 include/linux/spinlock.h:187 include/linux/spinlock_api_smp.h:111 kernel/locking/spinlock.c:162)\n[ 125.473909][ T1430] ? __pfx__raw_spin_lock_irqsave (kernel/locking/spinlock.c:161)\n[ 125.482537][ T1430] _destroy_id (drivers/infiniband/core/cma.c:2044) rdma_cm\n[ 125.495072][ T1430] nvme_rdma_free_queue (drivers/nvme/host/rdma.c:656 drivers/nvme/host/rdma.c:650) nvme_rdma\n[ 125.505827][ T1430] nvme_rdma_reset_ctrl_work (drivers/nvme/host/rdma.c:2180) nvme_rdma\n[ 125.505831][ T1430] process_one_work (kernel/workqueue.c:3231)\n[ 125.515122][ T1430] worker_thread (kernel/workqueue.c:3306 kernel/workqueue.c:3393)\n[ 125.515127][ T1430] ? __pfx_worker_thread (kernel/workqueue.c:3339)\n[ 125.531837][ T1430] kthread (kernel/kthread.c:389)\n[ 125.539864][ T1430] ? __pfx_kthread (kernel/kthread.c:342)\n[ 125.550628][ T1430] ret_from_fork (arch/x86/kernel/process.c:147)\n[ 125.558840][ T1430] ? __pfx_kthread (kernel/kthread.c:342)\n[ 125.558844][ T1430] ret_from_fork_asm (arch/x86/entry/entry_64.S:257)\n[ 125.566487][ T1430] \n[ 125.566488][ T1430] ---[ end trace 0000000000000000 ]---" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The most severe reasonable path is the in-kernel NVMe-oF target over iWARP: a remote initiator's CM connect-failure or disconnect queues `nvmet_rdma_release_queue_work` on `nvmet_wq` (WQ_MEM_RECLAIM), which reaches `rdma_destroy_id` → `iw_destroy_cm_id` → `flush_workqueue(iwcm_wq)`; the nvme-rdma host path is likewise driven by remote transport events from the peer.\nAC:L - The attacker drives both sides — repeated connect/abrupt-disconnect cycles reliably leave an in-flight iwcm event holding a cm_id reference, which is exactly the condition under which `iw_destroy_cm_id()` performs the flush, and attempts can be retried without limit.\nPR:N - The nvmet-rdma queue setup/teardown path runs entirely at the RDMA CM layer, before NVMe host-NQN access control or in-band authentication, so an unauthenticated remote peer that can reach the target port triggers it.\nUI:N - Triggered wholly by attacker-initiated RDMA CM connection and disconnection events; no action by any local user or administrator is required.\nS:U - The warning and the potential workqueue deadlock are confined to the kernel that owns the affected workqueues; no security authority boundary such as a VM or IOMMU domain is crossed.\nC:N - The flush itself is functionally correct — only the WQ_MEM_RECLAIM annotation was missing — so there is no memory corruption, out-of-bounds read, or attacker-observable data disclosure.\nI:N - No kernel or user data is modified; the defect is a workqueue forward-progress annotation, giving the attacker no write primitive of any kind.\nA:H - `check_flush_dependency()` raises a WARN that panics outright on the widely deployed `panic_on_warn=1` configuration, and the underlying condition it flags is a genuine deadlock — a memory-reclaim worker blocking forever on a rescuer-less workqueue, stalling `nvmet-wq`/`nvme-reset-wq`/`rdma_cm` under memory pressure." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/core/iwcm.c" ], "versions": [ { "version": "d91d253c87fd1efece521ff2612078a35af673c6", "lessThan": "da2708a19f45b4a7278adf523837c8db21d1e2b5", "status": "affected", "versionType": "git" }, { "version": "7f25f296fc9bd0435be14e89bf657cd615a23574", "lessThan": "29b3bbd912b8db86df7a3c180b910ccb621f5635", "status": "affected", "versionType": "git" }, { "version": "94ee7ff99b87435ec63211f632918dc7f44dac79", "lessThan": "2efe8da2ddbf873385b4bc55366d09350b408df6", "status": "affected", "versionType": "git" }, { "version": "557d035fe88d78dd51664f4dc0e1896c04c97cf6", "lessThan": "da0392698c62397c19deb1b9e9bdf2fbb5a9420e", "status": "affected", "versionType": "git" }, { "version": "dc8074b8901caabb97c2d353abd6b4e7fa5a59a5", "lessThan": "a64f30db12bdc937c5108158d98c8eab1925c548", "status": "affected", "versionType": "git" }, { "version": "ff5bbbdee08287d75d72e65b72a2b76d9637892a", "lessThan": "8b7df76356d098f85f3bd2c7cf6fb43f531893d7", "status": "affected", "versionType": "git" }, { "version": "ee39384ee787e86e9db4efb843818ef0ea9cb8ae", "lessThan": "c8b18a75282cfd27822a8cc3c1f005c1ac8d1a58", "status": "affected", "versionType": "git" }, { "version": "aee2424246f9f1dadc33faa78990c1e2eb7826e4", "lessThan": "a09dc967b3c58899e259c0aea092f421d22a0b04", "status": "affected", "versionType": "git" }, { "version": "aee2424246f9f1dadc33faa78990c1e2eb7826e4", "lessThan": "86dfdd8288907f03c18b7fb462e0e232c4f98d89", "status": "affected", "versionType": "git" }, { "version": "4.19.320", "lessThan": "4.19.323", "status": "affected", "versionType": "semver" }, { "version": "5.4.282", "lessThan": "5.4.285", "status": "affected", "versionType": "semver" }, { "version": "5.10.224", "lessThan": "5.10.227", "status": "affected", "versionType": "semver" }, { "version": "5.15.165", "lessThan": "5.15.168", "status": "affected", "versionType": "semver" }, { "version": "6.1.103", "lessThan": "6.1.113", "status": "affected", "versionType": "semver" }, { "version": "6.6.44", "lessThan": "6.6.54", "status": "affected", "versionType": "semver" }, { "version": "6.10.3", "lessThan": "6.10.13", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/infiniband/core/iwcm.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.323", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.285", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.227", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.168", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.113", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.54", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.13", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.2", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.320", "versionEndExcluding": "4.19.323" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.282", "versionEndExcluding": "5.4.285" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.224", "versionEndExcluding": "5.10.227" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.165", "versionEndExcluding": "5.15.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.103", "versionEndExcluding": "6.1.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.44", "versionEndExcluding": "6.6.54" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10.3", "versionEndExcluding": "6.10.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.11.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/da2708a19f45b4a7278adf523837c8db21d1e2b5" }, { "url": "https://git.kernel.org/stable/c/29b3bbd912b8db86df7a3c180b910ccb621f5635" }, { "url": "https://git.kernel.org/stable/c/2efe8da2ddbf873385b4bc55366d09350b408df6" }, { "url": "https://git.kernel.org/stable/c/da0392698c62397c19deb1b9e9bdf2fbb5a9420e" }, { "url": "https://git.kernel.org/stable/c/a64f30db12bdc937c5108158d98c8eab1925c548" }, { "url": "https://git.kernel.org/stable/c/8b7df76356d098f85f3bd2c7cf6fb43f531893d7" }, { "url": "https://git.kernel.org/stable/c/c8b18a75282cfd27822a8cc3c1f005c1ac8d1a58" }, { "url": "https://git.kernel.org/stable/c/a09dc967b3c58899e259c0aea092f421d22a0b04" }, { "url": "https://git.kernel.org/stable/c/86dfdd8288907f03c18b7fb462e0e232c4f98d89" } ], "title": "RDMA/iwcm: Fix WARNING:at_kernel/workqueue.c:#check_flush_dependency", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-47696", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-21T13:05:12.849051Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-21T13:14:14.398Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:21:01.362Z" } }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T11:58:14.517Z" }, "affected": [ { "vendor": "Siemens", "product": "RUGGEDCOM RST2428P", "versions": [ { "status": "affected", "version": "0", "lessThan": "V3.2", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family", "versions": [ { "status": "affected", "version": "0", "lessThan": "V3.2", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SCALANCE XCM-/XRM-/XCH-/XRH-300 family", "versions": [ { "status": "affected", "version": "0", "lessThan": "V3.2", "versionType": "custom" } ], "defaultStatus": "unknown" }, { "vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [ { "status": "affected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html" }, { "url": "https://cert-portal.siemens.com/productcert/html/ssa-355557.html" } ] } ] } }