{"metadata": {"vulnerability": "CVE-2026-99243", "count": 19, "kinds": {"milestone": 6, "sighting": 1, "kev": 0, "other": 12}}, "data": [{"timestamp": "2026-09-25T10:25:14.403Z", "date_only": false, "value": "2026-09-25T10:25:14.403Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-99243", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-11-03T11:14:30.233Z", "date_only": false, "value": "2026-11-03T11:14:30.233Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-99243", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-11-03T11:21:23.313Z", "date_only": false, "value": "2026-11-03T11:21:23.313195Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117552243194820600", "record": "CVE-2026-99243", "field": "creation_timestamp", "uuid": "887b4360-59ee-4b59-8a78-1ff1878f6487", "content": "CVE-2026-99243 io-wq: order the exit bit against worker creation task work In the Linux kernel, the following vulnerability has been resolved:\nio-wq: order the exit bit against worker creation task work\nio_wq_exit_workers() cancels task work for queued worker creation withtask_work_cancel_match(). That has a plain load of task->task_works.\nio_queue_worker_create() adds the new entry and tests IO_WQ_BIT_EXIT tocancel it if the workqueue is already on its way out.\nThat must be ordered. task_work_add() has a full barrier via cmpxchg().But io_wq_exit_start() sets the bit with set_bit() which doesn't haveany memory ordering.\nSo afaict, on weakly ordered architectures the exiting task may loadtask_works before the store of the bit is visible. The other side teststhe bit before the store is visible as well. So the entry remains queuedwith worker_refs and the exiting task waits on worker_done indefinitely.\nIf the task still has rings then io_uring_del_tctx_node() provides thebarrier via test_and_set_bit() in io_wq_set_exit_on_idle(). When ithas closed all rings though that barrier is gone.\nAdd the barrier after the set_bit().\nhttps://www.cve.org/CVERecord?id=CVE-2026-99243https://git.kernel.org/stable/c/67da3eec264aeb67835886720243ae2dc1463315https://git.kernel.org/stable/c/a63c752157eacf49f628359822666b32503d194ahttps://git.kernel.org/stable/c/1432d881d99584105122760133caeff1dce7a9f7https://git.kernel.org/stable/c/6cf012a4d5e461c788ecc9dbed67adc31a142644https://git.kernel.org/stable/c/0d81cdd433b0a96c5275c01b8172e0b1f71dd595https://git.kernel.org/stable/c/75395db7a9b40a2e826c838e648fef8ed1a2d174https://git.kernel.org/stable/c/31fc780b75b278d37700373d54a99fdb4117fdd6#kernel #Linux#CVE_2026_99243#bot", "url": "https://infosec.exchange/users/cve/statuses/117552243194820600"}, {"timestamp": "2026-11-03T12:17:00Z", "date_only": false, "value": "2026-11-03T12:17:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99243", "record": "UBUNTU-CVE-2026-99243", "field": "published", 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