CVE-2021-47569

{"id": "CVE-2021-47569", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-05-24T15:15:22.203", "references": [{"url": "https://git.kernel.org/stable/c/3d2a1e68fd9904fdc1b02f2e7d40ca47df7ba39f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/617a89484debcd4e7999796d693cf0b77d2519de", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/3d2a1e68fd9904fdc1b02f2e7d40ca47df7ba39f", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/617a89484debcd4e7999796d693cf0b77d2519de", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring: fail cancellation for EXITING tasks\n\nWARNING: CPU: 1 PID: 20 at fs/io_uring.c:6269 io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269\nCPU: 1 PID: 20 Comm: kworker/1:0 Not tainted 5.16.0-rc1-syzkaller #0\nWorkqueue: events io_fallback_req_func\nRIP: 0010:io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269\nCall Trace:\n <TASK>\n io_req_task_link_timeout+0x6b/0x1e0 fs/io_uring.c:6886\n io_fallback_req_func+0xf9/0x1ae fs/io_uring.c:1334\n process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298\n worker_thread+0x658/0x11f0 kernel/workqueue.c:2445\n kthread+0x405/0x4f0 kernel/kthread.c:327\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295\n </TASK>\n\nWe need original task's context to do cancellations, so if it's dying\nand the callback is executed in a fallback mode, fail the cancellation\nattempt."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: io_uring: cancelaci\u00f3n fallida para tareas SALIDAS ADVERTENCIA: CPU: 1 PID: 20 en fs/io_uring.c:6269 io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269 CPU: 1 PID: 20 Comm: kworker/1:0 No contaminado 5.16.0-rc1-syzkaller #0 Cola de trabajo: eventos io_fallback_req_func RIP: 0010:io_try_cancel_userdata+0x3c5/0x640 fs/io_uring.c:6269 Seguimiento de llamadas: io_req_task_link_timeout+0x6b /0x1e0 fs/io_uring.c:6886 io_fallback_req_func+0xf9/0x1ae fs/io_uring.c:1334 Process_one_work+0x9b2/0x1690 kernel/workqueue.c:2298 trabajador_thread+0x658/0x11f0 kernel/workqueue.c:2445 kthread+0x405/0 x4f0 kernel/kthread.c:327 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Necesitamos el contexto de la tarea original para realizar cancelaciones, por lo que si est\u00e1 muriendo y la devoluci\u00f3n de llamada se ejecuta en modo alternativo, fallar el intento de cancelaci\u00f3n."}], "lastModified": "2025-09-29T17:04:08.690", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "082C8F69-46F5-469A-A650-E0340F11BEF5", "versionEndExcluding": "5.15.6", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}