{"id":"CVE-2026-46727","details":"An issue was discovered in Ruby 4 before 4.0.5. A race condition leading to a use-after-free in the pthread-based getaddrinfo timeout handler (rb_getaddrinfo in ext/socket/raddrinfo.c) allows a remote attacker who can delay DNS responses near the user-specified timeout to crash a Ruby process that calls Addrinfo.getaddrinfo(..., timeout:) or Socket.tcp(..., resolv_timeout:). Memory-corruption-based exploitation is theoretically possible. The attack could, for example, be carried out through a crafted authoritative DNS server or recursive resolver.","aliases":["BIT-ruby-2026-46727","BIT-ruby-min-2026-46727"],"modified":"2026-07-08T08:13:36.433941965Z","published":"2026-05-22T00:00:00Z","related":["openSUSE-SU-2026:10839-1"],"database_specific":{"cna_assigner":"mitre","cwe_ids":["CWE-362"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46727.json","unresolved_ranges":[{"source":"AFFECTED_FIELD","extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.0.5"}]},{"source":"CPE_FIELD","extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.0.5"}]},{"source":"DESCRIPTION","extracted_events":[{"introduced":"4"},{"fixed":"4.0.5"}]}]},"references":[{"type":"WEB","url":"https://hackerone.com/reports/3607434"},{"type":"WEB","url":"https://www.ruby-lang.org/en/news/2026/05/20/getaddrinfo-cve-2026-46727/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46727.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46727"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/ruby/ruby","events":[{"introduced":"553f1675f3a9cece340b90f374a4245dccac2272"},{"fixed":"64336ffd0ee9e1f4c05891695a3d7b49cb709721"}],"database_specific":{"cpe":"cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*","source":"CPE_RANGE","extracted_events":[{"introduced":"4.0.0"},{"fixed":"4.0.5"}]}}],"versions":["v4.0.3","v4.0.2","v4.0.1","v4.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46727.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}