An issue was discovered in Ruby 4 before 4.0.5. (CVE-2026-46727)
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.
An issue was discovered in Ruby 4 before 4.0.5. (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.
Affected software
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Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-ruby-2026-46727
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-46727"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- High
- Cvss Version
- null
Threat ID: 6aa005c3acd9273b49ab5bf8
Added to database: 09/08/2026, 12:55:31 UTC
Last updated: 09/08/2026, 12:55:31 UTC
Views: 1
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