CVE-2022-48658

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over NVMe-TCP/RDMA a remote fabric peer can force reconnect exhaustion and nvme_delete_ctrl(), reaching kmem_cache_destroy\u2192flush_all_cpus_locked without local access.\nAC:L - A peer that drops the connection and refuses reconnects deterministically drives controller deletion into flush_all_cpus_locked\u2019s schedule_work_on(system_wq)+flush_work path; no race or attacker-uncontrollable layout is required.\nPR:N - Teardown is driven by remote transport/reconnect-failure events on an already-configured NVMe-oF link; the peer needs no local account or capabilities on the vulnerable host.\nUI:N - Reconnect and delete run from kernel workqueues after the peer-driven disconnect; no victim user action is required.\nS:U - The WARN and potential reclaim deadlock stay inside the host kernel\u2019s workqueue/SLUB paths and do not cross a VM, IOMMU, or other security-authority boundary.\nC:N - This is only an illegal WQ_MEM_RECLAIM\u2192!WQ_MEM_RECLAIM flush dependency; there is no UAF, OOB read, or other disclosure primitive.\nI:N - No out-of-bounds write, UAF, or other memory corruption occurs\u2014flush behavior is otherwise correct\u2014so there is no integrity or code-execution impact.\nA:H - check_flush_dependency() issues WARN_ONCE (panic under panic_on_warn), and the flagged condition is a real deadlock risk: a WQ_MEM_RECLAIM worker blocking on rescuer-less system_wq under memory pressure."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/slub.c"], "versions": [{"version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "lessThan": "61703b248be993eb4997b00ae5d3318e6d8f3c5b", "status": "affected", "versionType": "git"}, {"version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "lessThan": "df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a", "status": "affected", "versionType": "git"}, {"version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "lessThan": "e45cc288724f0cfd497bb5920bcfa60caa335729", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/slub.c"], "versions": [{"version": "5.15", "status": "affected"}, {"version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.71", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.12", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0", "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": "5.15", "versionEndExcluding": "5.15.71"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.19.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/61703b248be993eb4997b00ae5d3318e6d8f3c5b"}, {"url": "https://git.kernel.org/stable/c/df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a"}, {"url": "https://git.kernel.org/stable/c/e45cc288724f0cfd497bb5920bcfa60caa335729"}], "title": "mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:17:55.669Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/61703b248be993eb4997b00ae5d3318e6d8f3c5b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/e45cc288724f0cfd497bb5920bcfa60caa335729", "tags": ["x_transferred"]}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-48658", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:46:04.814997Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:55.526Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/61703b248be993eb4997b00ae5d3318e6d8f3c5b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/e45cc288724f0cfd497bb5920bcfa60caa335729", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:17:55.669Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2022-48658", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T15:46:04.814997Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T12:42:19.646Z"}}], "cna": {"title": "mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.5, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}, "scenarios": [{"lang": "en", "value": "AV:N - The documented trigger is NVMe controller teardown on nvme-delete-wq; over NVMe-TCP/RDMA a remote fabric peer can force reconnect exhaustion and nvme_delete_ctrl(), reaching kmem_cache_destroy\u2192flush_all_cpus_locked without local access.\nAC:L - A peer that drops the connection and refuses reconnects deterministically drives controller deletion into flush_all_cpus_locked\u2019s schedule_work_on(system_wq)+flush_work path; no race or attacker-uncontrollable layout is required.\nPR:N - Teardown is driven by remote transport/reconnect-failure events on an already-configured NVMe-oF link; the peer needs no local account or capabilities on the vulnerable host.\nUI:N - Reconnect and delete run from kernel workqueues after the peer-driven disconnect; no victim user action is required.\nS:U - The WARN and potential reclaim deadlock stay inside the host kernel\u2019s workqueue/SLUB paths and do not cross a VM, IOMMU, or other security-authority boundary.\nC:N - This is only an illegal WQ_MEM_RECLAIM\u2192!WQ_MEM_RECLAIM flush dependency; there is no UAF, OOB read, or other disclosure primitive.\nI:N - No out-of-bounds write, UAF, or other memory corruption occurs\u2014flush behavior is otherwise correct\u2014so there is no integrity or code-execution impact.\nA:H - check_flush_dependency() issues WARN_ONCE (panic under panic_on_warn), and the flagged condition is a real deadlock risk: a WQ_MEM_RECLAIM worker blocking on rescuer-less system_wq under memory pressure."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "lessThan": "61703b248be993eb4997b00ae5d3318e6d8f3c5b", "versionType": "git"}, {"status": "affected", "version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "lessThan": "df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a", "versionType": "git"}, {"status": "affected", "version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "lessThan": "e45cc288724f0cfd497bb5920bcfa60caa335729", "versionType": "git"}], "programFiles": ["mm/slub.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"status": "unaffected", "version": "0", "lessThan": "5.15", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.71", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "5.19.12", "versionType": "semver", "lessThanOrEqual": "5.19.*"}, {"status": "unaffected", "version": "6.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["mm/slub.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/61703b248be993eb4997b00ae5d3318e6d8f3c5b"}, {"url": "https://git.kernel.org/stable/c/df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a"}, {"url": "https://git.kernel.org/stable/c/e45cc288724f0cfd497bb5920bcfa60caa335729"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.\n\nCommit 5a836bf6b09f (\"mm: slub: move flush_cpu_slab() invocations\n__free_slab() invocations out of IRQ context\") moved all flush_cpu_slab()\ninvocations to the global workqueue to avoid a problem related\nwith deactivate_slab()/__free_slab() being called from an IRQ context\non PREEMPT_RT kernels.\n\nWhen the flush_all_cpu_locked() function is called from a task context\nit may happen that a workqueue with WQ_MEM_RECLAIM bit set ends up\nflushing the global workqueue, this will cause a dependency issue.\n\n workqueue: WQ_MEM_RECLAIM nvme-delete-wq:nvme_delete_ctrl_work [nvme_core]\n is flushing !WQ_MEM_RECLAIM events:flush_cpu_slab\n WARNING: CPU: 37 PID: 410 at kernel/workqueue.c:2637\n check_flush_dependency+0x10a/0x120\n Workqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core]\n RIP: 0010:check_flush_dependency+0x10a/0x120[ 453.262125] Call Trace:\n __flush_work.isra.0+0xbf/0x220\n ? __queue_work+0x1dc/0x420\n flush_all_cpus_locked+0xfb/0x120\n __kmem_cache_shutdown+0x2b/0x320\n kmem_cache_destroy+0x49/0x100\n bioset_exit+0x143/0x190\n blk_release_queue+0xb9/0x100\n kobject_cleanup+0x37/0x130\n nvme_fc_ctrl_free+0xc6/0x150 [nvme_fc]\n nvme_free_ctrl+0x1ac/0x2b0 [nvme_core]\n\nFix this bug by creating a workqueue for the flush operation with\nthe WQ_MEM_RECLAIM bit set."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.71", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.19.12", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0", "versionStartIncluding": "5.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:51:39.776Z"}}}, "cveMetadata": {"cveId": "CVE-2022-48658", "state": "PUBLISHED", "dateUpdated": "2026-08-05T08:51:39.776Z", "dateReserved": "2024-02-25T13:44:28.317Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-04-28T13:01:12.987Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["mm/slub.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "61703b248be993eb4997b00ae5d3318e6d8f3c5b", "status": "affected", "version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "versionType": "git"}, {"lessThan": "df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a", "status": "affected", "version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "versionType": "git"}, {"lessThan": "e45cc288724f0cfd497bb5920bcfa60caa335729", "status": "affected", "version": "5a836bf6b09f99ead1b69457ff39ab3011ece57b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["mm/slub.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.15"}, {"lessThan": "5.15", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.71", "versionType": "semver"}, {"lessThanOrEqual": "5.19.*", "status": "unaffected", "version": "5.19.12", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0DD72702-7EDC-4831-87FE-AAE2CF9EA537", "versionEndExcluding": "5.15.71", "versionStartExcluding": "5.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2D86B159-0AA3-429A-8FE5-B87DB2046DB6", "versionEndExcluding": "5.19.12", "versionStartExcluding": "5.16", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.\n\nCommit 5a836bf6b09f (\"mm: slub: move flush_cpu_slab() invocations\n__free_slab() invocations out of IRQ context\") moved all flush_cpu_slab()\ninvocations to the global workqueue to avoid a problem related\nwith deactivate_slab()/__free_slab() being called from an IRQ context\non PREEMPT_RT kernels.\n\nWhen the flush_all_cpu_locked() function is called from a task context\nit may happen that a workqueue with WQ_MEM_RECLAIM bit set ends up\nflushing the global workqueue, this will cause a dependency issue.\n\n workqueue: WQ_MEM_RECLAIM nvme-delete-wq:nvme_delete_ctrl_work [nvme_core]\n is flushing !WQ_MEM_RECLAIM events:flush_cpu_slab\n WARNING: CPU: 37 PID: 410 at kernel/workqueue.c:2637\n check_flush_dependency+0x10a/0x120\n Workqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core]\n RIP: 0010:check_flush_dependency+0x10a/0x120[ 453.262125] Call Trace:\n __flush_work.isra.0+0xbf/0x220\n ? __queue_work+0x1dc/0x420\n flush_all_cpus_locked+0xfb/0x120\n __kmem_cache_shutdown+0x2b/0x320\n kmem_cache_destroy+0x49/0x100\n bioset_exit+0x143/0x190\n blk_release_queue+0xb9/0x100\n kobject_cleanup+0x37/0x130\n nvme_fc_ctrl_free+0xc6/0x150 [nvme_fc]\n nvme_free_ctrl+0x1ac/0x2b0 [nvme_core]\n\nFix this bug by creating a workqueue for the flush operation with\nthe WQ_MEM_RECLAIM bit set."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: slub: corrige las invocaciones de flu_cpu_slab()/__free_slab() en el contexto de la tarea. Commit 5a836bf6b09f (\"mm: slub: mover invocaciones de flu_cpu_slab() invocaciones de __free_slab() fuera del contexto IRQ\") movi\u00f3 todas las invocaciones de flu_cpu_slab() a la cola de trabajo global para evitar un problema relacionado con la llamada de desactivate_slab()/__free_slab() desde un Contexto IRQ en n\u00facleos PREEMPT_RT. Cuando se llama a la funci\u00f3n Flush_all_cpu_locked() desde un contexto de tarea, puede suceder que una cola de trabajo con el bit WQ_MEM_RECLAIM configurado termine vaciando la cola de trabajo global, esto causar\u00e1 un problema de dependencia. cola de trabajo: WQ_MEM_RECLAIM nvme-delete-wq:nvme_delete_ctrl_work [nvme_core] se est\u00e1 vaciando! Eventos WQ_MEM_RECLAIM:flush_cpu_slab ADVERTENCIA: CPU: 37 PID: 410 en kernel/workqueue.c:2637 check_flush_dependency+0x10a/0x120 Cola de trabajo: vme-delete-wq nvme_delete_ctrl_work [ nvme_core] RIP: 0010:check_flush_dependency+0x10a/0x120[ 453.262125] Seguimiento de llamadas: __flush_work.isra.0+0xbf/0x220? __queue_work+0x1dc/0x420 Flush_all_cpus_locked+0xfb/0x120 __kmem_cache_shutdown+0x2b/0x320 kmem_cache_destroy+0x49/0x100 bioset_exit+0x143/0x190 blk_release_queue+0xb9/0x100 kobject_cleanup+0 x37/0x130 nvme_fc_ctrl_free+0xc6/0x150 [nvme_fc] nvme_free_ctrl+0x1ac/0x2b0 [nvme_core ] Corrija este error creando una cola de trabajo para la operaci\u00f3n de vaciado con el bit WQ_MEM_RECLAIM establecido."}], "id": "CVE-2022-48658", "lastModified": "2026-08-04T10:17:14.683", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2022-48658", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T15:46:04.814997Z", "version": "2.0.3"}}]}, "published": "2024-04-28T13:15:07.760", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61703b248be993eb4997b00ae5d3318e6d8f3c5b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e45cc288724f0cfd497bb5920bcfa60caa335729"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/61703b248be993eb4997b00ae5d3318e6d8f3c5b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/df6cb39335cf5a1b918e8dbd8ba7cd9f1d00e45a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e45cc288724f0cfd497bb5920bcfa60caa335729"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: mm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.", "id": "2277803", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2277803"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1047", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm: slub: fix flush_cpu_slab()/__free_slab() invocations in task context.\nCommit 5a836bf6b09f (\"mm: slub: move flush_cpu_slab() invocations\n__free_slab() invocations out of IRQ context\") moved all flush_cpu_slab()\ninvocations to the global workqueue to avoid a problem related\nwith deactivate_slab()/__free_slab() being called from an IRQ context\non PREEMPT_RT kernels.\nWhen the flush_all_cpu_locked() function is called from a task context\nit may happen that a workqueue with WQ_MEM_RECLAIM bit set ends up\nflushing the global workqueue, this will cause a dependency issue.\nworkqueue: WQ_MEM_RECLAIM nvme-delete-wq:nvme_delete_ctrl_work [nvme_core]\nis flushing !WQ_MEM_RECLAIM events:flush_cpu_slab\nWARNING: CPU: 37 PID: 410 at kernel/workqueue.c:2637\ncheck_flush_dependency+0x10a/0x120\nWorkqueue: nvme-delete-wq nvme_delete_ctrl_work [nvme_core]\nRIP: 0010:check_flush_dependency+0x10a/0x120[ 453.262125] Call Trace:\n__flush_work.isra.0+0xbf/0x220\n? __queue_work+0x1dc/0x420\nflush_all_cpus_locked+0xfb/0x120\n__kmem_cache_shutdown+0x2b/0x320\nkmem_cache_destroy+0x49/0x100\nbioset_exit+0x143/0x190\nblk_release_queue+0xb9/0x100\nkobject_cleanup+0x37/0x130\nnvme_fc_ctrl_free+0xc6/0x150 [nvme_fc]\nnvme_free_ctrl+0x1ac/0x2b0 [nvme_core]\nFix this bug by creating a workqueue for the flush operation with\nthe WQ_MEM_RECLAIM bit set."], "name": "CVE-2022-48658", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-04-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-48658\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-48658\nhttps://lore.kernel.org/linux-cve-announce/2024042800-CVE-2022-48658-4c9c@gregkh/T"], "threat_severity": "Low"}

{}