https://db.gcve.eu/sightings/feed 2026-05-02T04:20:33.502433+00:00 Vulnerability-Lookup info@gcve.eu python-feedgen Contains only the most 10 recent sightings. https://db.gcve.eu/sighting/1b4a3bac-9164-41bd-a520-3d47cc06b43c/export 2026-05-02T04:20:33.908628+00:00 cedric http://db.gcve.eu/user/cedric {"uuid": "1b4a3bac-9164-41bd-a520-3d47cc06b43c", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-20226", "type": "seen", "source": "https://t.me/cibsecurity/24009", "content": "\u203c CVE-2021-20226 \u203c\n\nA use-after-free flaw was found in the io_uring in Linux kernel, where a local attacker with a user privilege could cause a denial of service problem on the system The issue results from the lack of validating the existence of an object prior to performing operations on the object by not incrementing the file reference counter while in use. The highest threat from this vulnerability is to data integrity, confidentiality and system availability.\n\n\ud83d\udcd6 Read\n\nvia \"National Vulnerability Database\".", "creation_timestamp": "2021-02-23T20:35:25.000000Z"} 2021-02-23T20:35:25+00:00 https://db.gcve.eu/sighting/38411d3a-8fd6-46df-a9d0-ed588ba18dd7/export 2026-05-02T04:20:33.908530+00:00 cedric http://db.gcve.eu/user/cedric {"uuid": "38411d3a-8fd6-46df-a9d0-ed588ba18dd7", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-20226", "type": "published-proof-of-concept", "source": "https://t.me/tech_b0lt_Genona/2591", "content": "\u041d\u0438\u0447\u0435\u0433\u043e \u043d\u0435 \u043f\u043e\u043d\u044f\u0442\u043d\u043e, \u043d\u043e \u043e\u0447\u0435\u043d\u044c \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043d\u043e.\n\n> If that name sounds familiar at all, Ryota also competed in the most recent Pwn2Own and won $30,000 demonstrating a different privilege escalation bug on Ubuntu.\n\nCVE-2021-20226: A REFERENCE-COUNTING BUG IN THE LINUX KERNEL IO_URING SUBSYSTEM\nhttps://www.zerodayinitiative.com/blog/2021/4/22/cve-2021-20226-a-reference-counting-bug-in-the-linux-kernel-iouring-subsystem", "creation_timestamp": "2021-04-22T21:06:12.000000Z"} 2021-04-22T21:06:12+00:00 https://db.gcve.eu/sighting/916785a6-87eb-4834-acf9-bfa9f35aa217/export 2026-05-02T04:20:33.908432+00:00 cedric http://db.gcve.eu/user/cedric {"uuid": "916785a6-87eb-4834-acf9-bfa9f35aa217", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-20226", "type": "published-proof-of-concept", "source": "https://t.me/cKure/5026", "content": "\u25a0\u25a0\u25a0\u25a0\u25a1 A Reference-Counting Bug in the Linux Kernel io_uring Subsystem (PoC for CVE-2021-20226)\n\nhttps://www.zerodayinitiative.com/blog/2021/4/22/cve-2021-20226-a-reference-counting-bug-in-the-linux-kernel-iouring-subsystem", "creation_timestamp": "2021-04-23T06:47:25.000000Z"} 2021-04-23T06:47:25+00:00 https://db.gcve.eu/sighting/93f36259-8785-4f94-99c8-ecd46498e22c/export 2026-05-02T04:20:33.908328+00:00 cedric http://db.gcve.eu/user/cedric {"uuid": "93f36259-8785-4f94-99c8-ecd46498e22c", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-20226", "type": "published-proof-of-concept", "source": "https://t.me/CyberSecurityTechnologies/3195", "content": "A Reference-Counting Bug in the Linux Kernel io_uring Subsystem (PoC for CVE-2021-20226)\nhttps://www.zerodayinitiative.com/blog/2021/4/22/cve-2021-20226-a-reference-counting-bug-in-the-linux-kernel-iouring-subsystem", "creation_timestamp": "2021-04-23T12:03:01.000000Z"} 2021-04-23T12:03:01+00:00 https://db.gcve.eu/sighting/1083b8cf-66f9-47f3-ace7-e26e51790588/export 2026-05-02T04:20:33.908180+00:00 cedric http://db.gcve.eu/user/cedric {"uuid": "1083b8cf-66f9-47f3-ace7-e26e51790588", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-20226", "type": "published-proof-of-concept", "source": "https://t.me/linkersec/91", "content": "CVE-2021\u201320226: a reference counting bug which leads to local privilege escalation in io_uring\n\nAn article describing a bug in the io_uring subsystem. Improper handling of files_struct references leading to a use-after-free.\n\nhttps://flattsecurity.medium.com/cve-2021-20226-a-reference-counting-bug-which-leads-to-local-privilege-escalation-in-io-uring-e946bd69177a", "creation_timestamp": "2021-06-21T19:36:15.000000Z"} 2021-06-21T19:36:15+00:00 https://db.gcve.eu/sighting/c889e2da-eaa9-4525-bbb4-4a5158234011/export 2026-05-02T04:20:33.906369+00:00 cedric http://db.gcve.eu/user/cedric {"uuid": "c889e2da-eaa9-4525-bbb4-4a5158234011", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2021-20226", "type": "published-proof-of-concept", "source": "https://t.me/cKure/10664", "content": "\u25a0\u25a0\u25a0\u25a0\u25a1 CVE-2021\u201320226 a reference counting bug which leads to local privilege escalation in io_uring.\n\nhttps://flattsecurity.medium.com/cve-2021-20226-a-reference-counting-bug-which-leads-to-local-privilege-escalation-in-io-uring-e946bd69177a", "creation_timestamp": "2023-02-12T10:09:14.000000Z"} 2023-02-12T10:09:14+00:00