{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"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.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-31557" }, { "summary":"CVE-2026-31557 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-31557.json" }, { "summary":"openEuler-SA-2026-2869", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2869" }, { "summary":"CVE-2026-31557", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-31557&packageName=kernel" } ], "title":"openEuler cve CVE-2026-31557", "tracking":{ "initial_release_date":"2026-07-06T16:58:38+08:00", "revision_history":[ { "date":"2026-07-06T16:58:38+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-07-06T16:58:38+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } }, "current_release_date":"2026-07-06T16:58:38+08:00", "id":"CVE-2026-31557", "version":"1.0.0", "status":"interim" } }, "product_tree":{ "branches":[ { "name":"openEuler", "category":"vendor", "branches":[ { "name":"openEuler", "branches":[ { "product":{ "product_identification_helper":{ "cpe":"cpe:/a:openEuler:openEuler:24.03-LTS-SP3" }, "product_id":"openEuler-24.03-LTS-SP3", "name":"openEuler-24.03-LTS-SP3" }, 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"category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-31557", "notes":[ { "text":"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.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":[ "openEuler-24.03-LTS-SP3:bpftool-6.6.0-145.3.17.150.oe2403sp3.aarch64", "openEuler-24.03-LTS-SP3:bpftool-debuginfo-6.6.0-145.3.17.150.oe2403sp3.aarch64", "openEuler-24.03-LTS-SP3:kernel-6.6.0-145.3.17.150.oe2403sp3.aarch64", "openEuler-24.03-LTS-SP3:kernel-debuginfo-6.6.0-145.3.17.150.oe2403sp3.aarch64", 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