CVE-2026-31557

{"id": "CVE-2026-31557", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31557", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-10-16T15:10:53.279331Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "8832cf922151e9dfa2821736beb0ae2dd3968b6e", "lessThan": "ede147a85d1d4c075d13ba190453d6b09ecbea37", "versionType": "git"}, {"status": "affected", "version": "8832cf922151e9dfa2821736beb0ae2dd3968b6e", "lessThan": "a8a3fb2888e2c4fd5410a19ac1623cc78a2383ec", "versionType": "git"}, {"status": "affected", "version": "8832cf922151e9dfa2821736beb0ae2dd3968b6e", "lessThan": "49c7c50ee6325a084216e94395e067ecde8088fa", "versionType": "git"}, {"status": "affected", "version": "8832cf922151e9dfa2821736beb0ae2dd3968b6e", "lessThan": "ca111c9d8d6c9d5735878d933a1716c4be86c2d1", "versionType": "git"}, {"status": "affected", "version": "8832cf922151e9dfa2821736beb0ae2dd3968b6e", "lessThan": "25ceffc1dabec3b93f458b437aae26f4da293f87", "versionType": "git"}, {"status": "affected", "version": "8832cf922151e9dfa2821736beb0ae2dd3968b6e", "lessThan": "2922e3507f6d5caa7f1d07f145e186fc6f317a4e", "versionType": "git"}, {"status": "affected", "version": "d44ff3b100b94e9f23b1e8dbe688eee9bb867ac9", "versionType": "git"}, {"status": "affected", "version": "84026f8c9357c62a9d3e4c554ffd10ccab813654", "versionType": "git"}, {"status": "affected", "version": "5.15.42", "lessThan": "5.16", "versionType": "semver"}, {"status": "affected", "version": "5.17.10", "lessThan": "5.18", "versionType": "semver"}], "programFiles": ["drivers/nvme/target/admin-cmd.c", "drivers/nvme/target/core.c", "drivers/nvme/target/nvmet.h", "drivers/nvme/target/rdma.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.18"}, {"status": "unaffected", "version": "0", "lessThan": "5.18", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.191", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.160", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.80", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.21", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.11", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/nvme/target/admin-cmd.c", "drivers/nvme/target/core.c", "drivers/nvme/target/nvmet.h", "drivers/nvme/target/rdma.c"], "defaultStatus": "affected"}]}], "published": "2026-04-24T15:16:30.080", "references": [{"url": "https://git.kernel.org/stable/c/25ceffc1dabec3b93f458b437aae26f4da293f87", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2922e3507f6d5caa7f1d07f145e186fc6f317a4e", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/49c7c50ee6325a084216e94395e067ecde8088fa", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a8a3fb2888e2c4fd5410a19ac1623cc78a2383ec", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ca111c9d8d6c9d5735878d933a1716c4be86c2d1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ede147a85d1d4c075d13ba190453d6b09ecbea37", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}, {"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-667"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet: move async event work off nvmet-wq\n\nFor target nvmet_ctrl_free() flushes ctrl->async_event_work.\nIf nvmet_ctrl_free() runs on nvmet-wq, the flush re-enters workqueue\ncompletion for the same worker:-\n\nA. Async event work queued on nvmet-wq (prior to disconnect):\n nvmet_execute_async_event()\n queue_work(nvmet_wq, &ctrl->async_event_work)\n\n nvmet_add_async_event()\n queue_work(nvmet_wq, &ctrl->async_event_work)\n\nB. Full pre-work chain (RDMA CM path):\n nvmet_rdma_cm_handler()\n nvmet_rdma_queue_disconnect()\n __nvmet_rdma_queue_disconnect()\n queue_work(nvmet_wq, &queue->release_work)\n process_one_work()\n lock((wq_completion)nvmet-wq) <--------- 1st\n nvmet_rdma_release_queue_work()\n\nC. Recursive path (same worker):\n nvmet_rdma_release_queue_work()\n nvmet_rdma_free_queue()\n nvmet_sq_destroy()\n nvmet_ctrl_put()\n nvmet_ctrl_free()\n flush_work(&ctrl->async_event_work)\n __flush_work()\n touch_wq_lockdep_map()\n lock((wq_completion)nvmet-wq) <--------- 2nd\n\nLockdep splat:\n\n ============================================\n WARNING: possible recursive locking detected\n 6.19.0-rc3nvme+ #14 Tainted: G N\n --------------------------------------------\n kworker/u192:42/44933 is trying to acquire lock:\n ffff888118a00948 ((wq_completion)nvmet-wq){+.+.}-{0:0}, at: touch_wq_lockdep_map+0x26/0x90\n\n but task is already holding lock:\n ffff888118a00948 ((wq_completion)nvmet-wq){+.+.}-{0:0}, at: process_one_work+0x53e/0x660\n\n 3 locks held by kworker/u192:42/44933:\n #0: ffff888118a00948 ((wq_completion)nvmet-wq){+.+.}-{0:0}, at: process_one_work+0x53e/0x660\n #1: ffffc9000e6cbe28 ((work_completion)(&queue->release_work)){+.+.}-{0:0}, at: process_one_work+0x1c5/0x660\n #2: ffffffff82d4db60 (rcu_read_lock){....}-{1:3}, at: __flush_work+0x62/0x530\n\n Workqueue: nvmet-wq nvmet_rdma_release_queue_work [nvmet_rdma]\n Call Trace:\n __flush_work+0x268/0x530\n nvmet_ctrl_free+0x140/0x310 [nvmet]\n nvmet_cq_put+0x74/0x90 [nvmet]\n nvmet_rdma_free_queue+0x23/0xe0 [nvmet_rdma]\n nvmet_rdma_release_queue_work+0x19/0x50 [nvmet_rdma]\n process_one_work+0x206/0x660\n worker_thread+0x184/0x320\n kthread+0x10c/0x240\n ret_from_fork+0x319/0x390\n\nMove async event work to a dedicated nvmet-aen-wq to avoid reentrant\nflush on nvmet-wq."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: nvmet: mover el trabajo de eventos as\u00edncronos fuera de nvmet-wq Para el objetivo, nvmet_ctrl_free() vac\u00eda ctrl -> async_event_work.\nSi nvmet_ctrl_free() se ejecuta en nvmet-wq, el vaciado vuelve a entrar en la finalizaci\u00f3n de la cola de trabajo para el mismo trabajador:- A. Trabajo de eventos as\u00edncronos en cola en nvmet-wq (antes de la desconexi\u00f3n): nvmet_execute_async_event() queue_work(nvmet_wq, ref:ctrl -> async_event_work) nvmet_add_async_event() queue_work(nvmet_wq, ref:ctrl -> async_event_work) B. Cadena completa de pre-trabajo (ruta RDMA CM): nvmet_rdma_cm_handler() nvmet_rdma_queue_disconnect() __nvmet_rdma_queue_disconnect() queue_work(nvmet_wq, ref:queue -> release_work) process_one_work() lock((wq_completion)nvmet-wq) <- - - - - - - - - 1\u00aa nvmet_rdma_release_queue_work() C. Ruta recursiva (mismo trabajador): nvmet_rdma_release_queue_work() nvmet_rdma_free_queue() nvmet_sq_destroy() nvmet_ctrl_put() nvmet_ctrl_free() flush_work(ref:ctrl -> async_event_work) __flush_work() touch_wq_lockdep_map() lock((wq_completion)nvmet-wq) <- - - - - - - - - 2\u00aa Error de Lockdep: ============================================ ADVERTENCIA: posible bloqueo recursivo detectado 6.19.0-rc3nvme+ #14 Tainted: G N - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - kworker/u192:42/44933 est\u00e1 intentando adquirir el bloqueo: ffff888118a00948 ((wq_completion)nvmet-wq){+.+.}-{0:0}, en: touch_wq_lockdep_map+0x26/0x90 pero la tarea ya tiene el bloqueo: ffff888118a00948 ((wq_completion)nvmet-wq){+.+.}-{0:0}, en: process_one_work+0x53e/0x660 3 bloqueos mantenidos por kworker/u192:42/44933: #0: ffff888118a00948 ((wq_completion)nvmet-wq){+.+.}-{0:0}, en: process_one_work+0x53e/0x660 #1: ffffc9000e6cbe28 ((work_completion)(ref:queue -> release_work)){+.+.}-{0:0}, en: process_one_work+0x1c5/0x660 #2: ffffffff82d4db60 (rcu_read_lock){....}-{1:3}, en: __flush_work+0x62/0x530 Cola de trabajo: nvmet-wq nvmet_rdma_release_queue_work [nvmet_rdma] Traza de llamada: __flush_work+0x268/0x530 nvmet_ctrl_free+0x140/0x310 [nvmet] nvmet_cq_put+0x74/0x90 [nvmet] nvmet_rdma_free_queue+0x23/0xe0 [nvmet_rdma] nvmet_rdma_release_queue_work+0x19/0x50 [nvmet_rdma] process_one_work+0x206/0x660 worker_thread+0x184/0x320 kthread+0x10c/0x240 ret_from_fork+0x319/0x390 Mover el trabajo de eventos as\u00edncronos a una nvmet-aen-wq dedicada para evitar el vaciado reentrante en nvmet-wq."}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "752141E3-2E88-4CDB-962E-FE1DFC022596", "versionEndExcluding": "5.16", "versionStartIncluding": "5.15.42"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E648BBD2-268B-4150-94DA-5E0D23BF336E", "versionEndExcluding": "5.18", "versionStartIncluding": "5.17.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "67222101-CC02-4250-A6E8-A98BDD29DB6F", "versionEndExcluding": "6.12.80", "versionStartIncluding": "5.18.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "ED39847A-3B46-4729-B7CA-B2C30B9FA8FE", "versionEndExcluding": "6.18.21", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4CA2E747-A9EC-4518-9AA2-B4247FC748B7", "versionEndExcluding": "6.19.11", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0384FA0A-DE99-48D7-84E3-46ED0C3B5E03"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}