{"uuid": "2fb82ca2-e88a-4c78-88de-f70219f3411b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21655", "type": "seen", "source": "https://t.me/cvedetector/15887", "content": "{\n  \"Source\": \"CVE FEED\",\n  \"Title\": \"CVE-2025-21655 - Linux Kernel io_uring EventFD RCU Refcount Vulnerability\", \n  \"Content\": \"CVE ID : CVE-2025-21655 \nPublished : Jan. 20, 2025, 2:15 p.m. | 31\u00a0minutes ago \nDescription : In the Linux kernel, the following vulnerability has been resolved:  \n  \nio_uring/eventfd: ensure io_eventfd_signal() defers another RCU period  \n  \nio_eventfd_do_signal() is invoked from an RCU callback, but when  \ndropping the reference to the io_ev_fd, it calls io_eventfd_free()  \ndirectly if the refcount drops to zero. This isn't correct, as any  \npotential freeing of the io_ev_fd should be deferred another RCU grace  \nperiod.  \n  \nJust call io_eventfd_put() rather than open-code the dec-and-test and  \nfree, which will correctly defer it another RCU grace period. \nSeverity: 0.0 | NA \nVisit the link for more details, such as CVSS details, affected products, timeline, and more...\",\n  \"Detection Date\": \"20 Jan 2025\",\n  \"Type\": \"Vulnerability\"\n}\n\ud83d\udd39 t.me/cvedetector \ud83d\udd39", "creation_timestamp": "2025-01-20T15:52:49.000000Z"}