{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2024-56641", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-12-27T15:00:39.839Z", "datePublished": "2024-12-27T15:02:42.958Z", "dateUpdated": "2026-05-11T20:56:25.107Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T20:56:25.107Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: initialize close_work early to avoid warning\n\nWe encountered a warning that close_work was canceled before\ninitialization.\n\n WARNING: CPU: 7 PID: 111103 at kernel/workqueue.c:3047 __flush_work+0x19e/0x1b0\n Workqueue: events smc_lgr_terminate_work [smc]\n RIP: 0010:__flush_work+0x19e/0x1b0\n Call Trace:\n ? __wake_up_common+0x7a/0x190\n ? work_busy+0x80/0x80\n __cancel_work_timer+0xe3/0x160\n smc_close_cancel_work+0x1a/0x70 [smc]\n smc_close_active_abort+0x207/0x360 [smc]\n __smc_lgr_terminate.part.38+0xc8/0x180 [smc]\n process_one_work+0x19e/0x340\n worker_thread+0x30/0x370\n ? process_one_work+0x340/0x340\n kthread+0x117/0x130\n ? __kthread_cancel_work+0x50/0x50\n ret_from_fork+0x22/0x30\n\nThis is because when smc_close_cancel_work is triggered, e.g. the RDMA\ndriver is rmmod and the LGR is terminated, the conn->close_work is\nflushed before initialization, resulting in WARN_ON(!work->func).\n\n__smc_lgr_terminate | smc_connect_{rdma|ism}\n-------------------------------------------------------------\n | smc_conn_create\n\t\t\t\t| \\- smc_lgr_register_conn\nfor conn in lgr->conns_all |\n\\- smc_conn_kill |\n \\- smc_close_active_abort |\n \\- smc_close_cancel_work |\n \\- cancel_work_sync |\n \\- __flush_work |\n\t (close_work) |\n\t | smc_close_init\n\t | \\- INIT_WORK(&close_work)\n\nSo fix this by initializing close_work before establishing the\nconnection."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/af_smc.c"], "versions": [{"version": "46c28dbd4c23c3f7fa37f5ea48772af79c9cc40e", "lessThan": "f0c37002210aaede10dae849d1a78efc2243add2", "status": "affected", "versionType": "git"}, {"version": "46c28dbd4c23c3f7fa37f5ea48772af79c9cc40e", "lessThan": "6638e52dcfafaf1b9cbc34544f0c832db0069ea1", "status": "affected", "versionType": "git"}, {"version": "46c28dbd4c23c3f7fa37f5ea48772af79c9cc40e", "lessThan": "0541db8ee32c09463a72d0987382b3a3336b0043", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/smc/af_smc.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.66", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.5", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.13", "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": "4.12", "versionEndExcluding": "6.6.66"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.13"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/f0c37002210aaede10dae849d1a78efc2243add2"}, {"url": "https://git.kernel.org/stable/c/6638e52dcfafaf1b9cbc34544f0c832db0069ea1"}, {"url": "https://git.kernel.org/stable/c/0541db8ee32c09463a72d0987382b3a3336b0043"}], "title": "net/smc: initialize close_work early to avoid warning", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "8D1BA5AF-8DA3-47DD-8406-865833A2A5FC", "versionEndExcluding": "6.6.66", "versionStartIncluding": "4.12", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "9501D045-7A94-42CA-8B03-821BE94A65B7", "versionEndExcluding": "6.12.5", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.13:rc1:*:*:*:*:*:*", "matchCriteriaId": "62567B3C-6CEE-46D0-BC2E-B3717FBF7D13", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/smc: initialize close_work early to avoid warning\n\nWe encountered a warning that close_work was canceled before\ninitialization.\n\n WARNING: CPU: 7 PID: 111103 at kernel/workqueue.c:3047 __flush_work+0x19e/0x1b0\n Workqueue: events smc_lgr_terminate_work [smc]\n RIP: 0010:__flush_work+0x19e/0x1b0\n Call Trace:\n ? __wake_up_common+0x7a/0x190\n ? work_busy+0x80/0x80\n __cancel_work_timer+0xe3/0x160\n smc_close_cancel_work+0x1a/0x70 [smc]\n smc_close_active_abort+0x207/0x360 [smc]\n __smc_lgr_terminate.part.38+0xc8/0x180 [smc]\n process_one_work+0x19e/0x340\n worker_thread+0x30/0x370\n ? process_one_work+0x340/0x340\n kthread+0x117/0x130\n ? __kthread_cancel_work+0x50/0x50\n ret_from_fork+0x22/0x30\n\nThis is because when smc_close_cancel_work is triggered, e.g. the RDMA\ndriver is rmmod and the LGR is terminated, the conn->close_work is\nflushed before initialization, resulting in WARN_ON(!work->func).\n\n__smc_lgr_terminate | smc_connect_{rdma|ism}\n-------------------------------------------------------------\n | smc_conn_create\n\t\t\t\t| \\- smc_lgr_register_conn\nfor conn in lgr->conns_all |\n\\- smc_conn_kill |\n \\- smc_close_active_abort |\n \\- smc_close_cancel_work |\n \\- cancel_work_sync |\n \\- __flush_work |\n\t (close_work) |\n\t | smc_close_init\n\t | \\- INIT_WORK(&close_work)\n\nSo fix this by initializing close_work before establishing the\nconnection."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/smc: inicializar close_work antes para evitar advertencias Encontramos una advertencia que indicaba que close_work se cancel\u00f3 antes de la inicializaci\u00f3n. ADVERTENCIA: CPU: 7 PID: 111103 en kernel/workqueue.c:3047 __flush_work+0x19e/0x1b0 Workqueue: eventos smc_lgr_terminate_work [smc] RIP: 0010:__flush_work+0x19e/0x1b0 Rastreo de llamadas: ? __wake_up_common+0x7a/0x190 ? trabajo_ocupado+0x80/0x80 __cancelar_temporizador_trabajo+0xe3/0x160 smc_cerrar_cancelar_trabajo+0x1a/0x70 [smc] smc_cerrar_aborto_activo+0x207/0x360 [smc] __smc_lgr_terminate.part.38+0xc8/0x180 [smc] proceso_uno_trabajo+0x19e/0x340 subproceso_trabajador+0x30/0x370 ? proceso_uno_trabajo+0x340/0x340 kthread+0x117/0x130 ? __kthread_cancel_work+0x50/0x50 ret_from_fork+0x22/0x30 Esto se debe a que cuando se activa smc_close_cancel_work, p. ej., el controlador RDMA es rmmod y se termina el LGR, conn->close_work se vac\u00eda antes de la inicializaci\u00f3n, lo que genera WARN_ON(!work->func). __smc_lgr_terminate | smc_connect_{rdma|ism} ------------------------------------------------------------- | smc_conn_create | \\- smc_lgr_register_conn para conn en lgr->conns_all | \\- smc_conn_kill | \\- smc_close_active_abort | \\- smc_close_cancel_work | \\- cancel_work_sync | \\- __flush_work | (close_work) | | smc_close_init | \\- INIT_WORK(&close_work) Solucione esto inicializando close_work antes de establecer la conexi\u00f3n."}], "id": "CVE-2024-56641", "lastModified": "2025-10-06T17:38:15.090", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2024-12-27T15:15:23.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0541db8ee32c09463a72d0987382b3a3336b0043"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6638e52dcfafaf1b9cbc34544f0c832db0069ea1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f0c37002210aaede10dae849d1a78efc2243add2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net/smc: initialize close_work early to avoid warning", "id": "2334558", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2334558"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.3", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-665", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnet/smc: initialize close_work early to avoid warning\nWe encountered a warning that close_work was canceled before\ninitialization.\nWARNING: CPU: 7 PID: 111103 at kernel/workqueue.c:3047 __flush_work+0x19e/0x1b0\nWorkqueue: events smc_lgr_terminate_work [smc]\nRIP: 0010:__flush_work+0x19e/0x1b0\nCall Trace:\n? __wake_up_common+0x7a/0x190\n? work_busy+0x80/0x80\n__cancel_work_timer+0xe3/0x160\nsmc_close_cancel_work+0x1a/0x70 [smc]\nsmc_close_active_abort+0x207/0x360 [smc]\n__smc_lgr_terminate.part.38+0xc8/0x180 [smc]\nprocess_one_work+0x19e/0x340\nworker_thread+0x30/0x370\n? process_one_work+0x340/0x340\nkthread+0x117/0x130\n? __kthread_cancel_work+0x50/0x50\nret_from_fork+0x22/0x30\nThis is because when smc_close_cancel_work is triggered, e.g. the RDMA\ndriver is rmmod and the LGR is terminated, the conn->close_work is\nflushed before initialization, resulting in WARN_ON(!work->func).\n__smc_lgr_terminate | smc_connect_{rdma|ism}\n-------------------------------------------------------------\n| smc_conn_create\n| \\- smc_lgr_register_conn\nfor conn in lgr->conns_all |\n\\- smc_conn_kill |\n\\- smc_close_active_abort |\n\\- smc_close_cancel_work |\n\\- cancel_work_sync |\n\\- __flush_work |\n(close_work) |\n| smc_close_init\n| \\- INIT_WORK(&close_work)\nSo fix this by initializing close_work before establishing the\nconnection."], "name": "CVE-2024-56641", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-12-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-56641\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-56641\nhttps://lore.kernel.org/linux-cve-announce/2024122736-CVE-2024-56641-5492@gregkh/T"], "threat_severity": "Low"}

{"created": "2025-07-12T22:31:17.279751+00:00", "updated": "2025-07-12T22:31:17.279865+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}