{"id":"UBUNTU-CVE-2026-49941","details":"Net::CIDR::Set versions through 0.20 for Perl did not validate IP addresses. The add method called the _encode method to parse addresses. If the addresses did not look like netmasks or network ranges, then they were assumed to single IP addresses and passed back to itself as a 32-bit or 128-bit netmask. If the argument was not a well-formed IP address, then this would lead to indefinite recursion. An attacker could use this to cause a denial of service.","modified":"2026-06-12T09:04:21.344528954Z","published":"2026-06-04T17:16:00Z","upstream":["CVE-2026-49941"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-49941"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-49941"},{"type":"REPORT","url":"https://github.com/robrwo/perl-Net-CIDR-Set/commit/3a40b4c0d0e8ef996ccb7aee1d5f108187431c2b"}],"affected":[{"package":{"name":"libnet-cidr-set-perl","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13-2"],"ecosystem_specific":{"binaries":[{"binary_name":"libnet-cidr-set-perl","binary_version":"0.13-2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49941.json"}},{"package":{"name":"libnet-cidr-set-perl","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13-3"],"ecosystem_specific":{"binaries":[{"binary_name":"libnet-cidr-set-perl","binary_version":"0.13-3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49941.json"}},{"package":{"name":"libnet-cidr-set-perl","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13-4","0.13-5"],"ecosystem_specific":{"binaries":[{"binary_version":"0.13-5","binary_name":"libnet-cidr-set-perl"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49941.json"}},{"package":{"name":"libnet-cidr-set-perl","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.13-5","0.15-1","0.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnet-cidr-set-perl","binary_version":"0.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49941.json"}},{"package":{"name":"libnet-cidr-set-perl","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libnet-cidr-set-perl?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.19-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnet-cidr-set-perl","binary_version":"0.19-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-49941.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}