CVE-2026-46727

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.

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Produits concernés

• ruby-lang Ruby

Scores CVSS

Faiblesses (CWE)

• CWE-362

Références

• https://hackerone.com/reports/3607434 Permissions Required
• https://www.ruby-lang.org/en/news/2026/05/20/getaddrinfo-cve-2026-46727/ Vendor Advisory

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories