CVE-2026-46727_CVE-2026-46727

8.1 / 10

HIGH

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

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.

Basic Information

ID CVE-2026-46727

Source mitre

Published May 22, 2026 at 00:00

Modified May 22, 2026 at 17:46

Affected Product

Vendor ruby-lang

Product Ruby

Version 4.0.0

Affected Versions ruby-lang Ruby 4.0.0

CWE Classification

CWE-362

References

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    "published": "2026-05-22T00:00:00.000Z",
    "modified": "2026-05-22T17:46:34.949Z",
    "type": "cve",
    "title": "CVE-2026-46727",
    "source": "mitre",
    "references": "https://hackerone.com/reports/3607434\nhttps://www.ruby-lang.org/en/news/2026/05/20/getaddrinfo-cve-2026-46727/",
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