resolv: resolv gem: Denial of Service via uncontrolled memory growth from crafted DNS responses

A flaw was found in the resolv gem. An attacker controlling DNS responses e.g., a spoofed response or a malicious upstream DNS server can exploit this by sending crafted DNS responses containing many distinct unknown DNS resource record pairs or SvcParamKeys. This leads to uncontrolled memory...

resolv: Resolv gem: DNS allowlist and egress bypass, and cache poisoning via crafted hostnames

A flaw was found in the resolv gem. This vulnerability arises from the incorrect handling of DNS label lengths during message encoding. A remote attacker could exploit this by providing a specially crafted hostname to an application utilizing the resolv gem. This could lead to the bypass of...

resolv: resolv gem: Denial of Service via uncontrolled memory growth from crafted DNS responses

A flaw was found in the resolv gem. An attacker controlling DNS responses e.g., a spoofed response or a malicious upstream DNS server can exploit this by sending crafted DNS responses containing many distinct unknown DNS resource record pairs or SvcParamKeys. This leads to uncontrolled memory...

resolv: Resolv gem: DNS allowlist and egress bypass, and cache poisoning via crafted hostnames

A flaw was found in the resolv gem. This vulnerability arises from the incorrect handling of DNS label lengths during message encoding. A remote attacker could exploit this by providing a specially crafted hostname to an application utilizing the resolv gem. This could lead to the bypass of...

CVE-2026-80213

A flaw was found in the resolv gem. This vulnerability arises from the incorrect handling of DNS label lengths during message encoding. A remote attacker could exploit this by providing a specially crafted hostname to an application utilizing the resolv gem. This could lead to the bypass of...

CVE-2026-80212

A flaw was found in the resolv gem. An attacker controlling DNS responses e.g., a spoofed response or a malicious upstream DNS server can exploit this by sending crafted DNS responses containing many distinct unknown DNS resource record pairs or SvcParamKeys. This leads to uncontrolled memory...

Linux Distros Unpatched Vulnerability : CVE-2026-80213

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its...

Linux Distros Unpatched Vulnerability : CVE-2026-80212

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::Resource.getclass, Resolv::DNS::Resource::Generic.create, and...

AZL-98229 CVE-2026-80213 affecting package ruby 3.3.5-8

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its range. A label longer than 255 octets had its length stored modulo 256 but the label data was written unchanged, and thus the bytes on t...

CVE-2026-80213

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its range. A label longer than 255 octets had its length stored modulo 256 but the label data was written unchanged, and thus the bytes on t...

AZL-98232 CVE-2026-80212 affecting package ruby 3.3.5-8

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::Resource.getclass, Resolv::DNS::Resource::Generic.create, and Resolv::DNS::SvcParam::Generic.create generate a new class for each unknown DNS resource record type, class pair, or each unknown SvcParamKey, encountered...

CVE-2026-80213

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its range. A label longer than 255 octets had its length stored modulo 256 but the label data was written unchanged, and thus the bytes on t...

CVE-2026-80213

CVE-2026-80213 affects the resolv gem (before 0.7.2 ) for Ruby. The vulnerability resides in Resolv::DNS::MessageEncoder , which wrote a DNS label's length into a single octet without range validation. Labels longer than 255 octets had their length stored modulo 256 while the label data was writt...

CVE-2026-80213

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its range. A label longer than 255 octets had its length stored modulo 256 but the label data was written unchanged, and thus the bytes on t...

EUVD-2026-67139

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::MessageEncoder wrote a DNS label's length into a single octet without checking its range. A label longer than 255 octets had its length stored modulo 256 but the label data was written unchanged, and thus the bytes on t...

CVE-2026-80212

An issue was discovered in the resolv gem before 0.7.2 for Ruby. Resolv::DNS::Resource.getclass, Resolv::DNS::Resource::Generic.create, and Resolv::DNS::SvcParam::Generic.create generate a new class for each unknown DNS resource record type, class pair, or each unknown SvcParamKey, encountered...

resolv: resolv gem: Denial of Service via uncontrolled memory growth from crafted DNS responses

A flaw was found in the resolv gem. An attacker controlling DNS responses e.g., a spoofed response or a malicious upstream DNS server can exploit this by sending crafted DNS responses containing many distinct unknown DNS resource record pairs or SvcParamKeys. This leads to uncontrolled memory...

resolv: Resolv gem: DNS allowlist and egress bypass, and cache poisoning via crafted hostnames

A flaw was found in the resolv gem. This vulnerability arises from the incorrect handling of DNS label lengths during message encoding. A remote attacker could exploit this by providing a specially crafted hostname to an application utilizing the resolv gem. This could lead to the bypass of...

resolv: Resolv gem: DNS allowlist and egress bypass, and cache poisoning via crafted hostnames

A flaw was found in the resolv gem. This vulnerability arises from the incorrect handling of DNS label lengths during message encoding. A remote attacker could exploit this by providing a specially crafted hostname to an application utilizing the resolv gem. This could lead to the bypass of...

resolv: resolv gem: Denial of Service via uncontrolled memory growth from crafted DNS responses

A flaw was found in the resolv gem. An attacker controlling DNS responses e.g., a spoofed response or a malicious upstream DNS server can exploit this by sending crafted DNS responses containing many distinct unknown DNS resource record pairs or SvcParamKeys. This leads to uncontrolled memory...