{"id":"UBUNTU-CVE-2026-57053","details":"GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.","modified":"2026-07-09T21:32:00.287032307Z","published":"2026-06-23T18:18:00Z","related":["USN-8521-1"],"upstream":["CVE-2026-57053"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-57053"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-57053"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/help-libidn/2026-06/msg00001.html"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/help-libidn/2026-05/msg00000.html"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8521-1"}],"affected":[{"package":{"name":"libidn","ecosystem":"Ubuntu:14.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.28-1ubuntu1","1.28-1ubuntu2","1.28-1ubuntu2.1","1.28-1ubuntu2.2"],"ecosystem_specific":{"binaries":[{"binary_name":"idn","binary_version":"1.28-1ubuntu2.2"},{"binary_name":"libidn11","binary_version":"1.28-1ubuntu2.2"},{"binary_name":"libidn11-java","binary_version":"1.28-1ubuntu2.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57053.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.28-1ubuntu2","1.32-3ubuntu1","1.32-3ubuntu1.1","1.32-3ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_name":"idn","binary_version":"1.32-3ubuntu1.2"},{"binary_name":"libidn11","binary_version":"1.32-3ubuntu1.2"},{"binary_name":"libidn11-java","binary_version":"1.32-3ubuntu1.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57053.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.33-2","1.33-2.1","1.33-2.1ubuntu1","1.33-2.1ubuntu1.1","1.33-2.1ubuntu1.2"],"ecosystem_specific":{"binaries":[{"binary_name":"idn","binary_version":"1.33-2.1ubuntu1.2"},{"binary_version":"1.33-2.1ubuntu1.2","binary_name":"libidn11"},{"binary_name":"libidn11-java","binary_version":"1.33-2.1ubuntu1.2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57053.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.33-2.2ubuntu2"],"ecosystem_specific":{"binaries":[{"binary_name":"idn","binary_version":"1.33-2.2ubuntu2"},{"binary_name":"libidn11","binary_version":"1.33-2.2ubuntu2"},{"binary_name":"libidn11-java","binary_version":"1.33-2.2ubuntu2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57053.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.38-4ubuntu1.1"}]}],"versions":["1.33-3","1.33-3build1","1.38-4","1.38-4build1","1.38-4ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"1.38-4ubuntu1.1","binary_name":"idn"},{"binary_name":"libidn12","binary_version":"1.38-4ubuntu1.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-57053.json"}},{"package":{"name":"libidn","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libidn?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.42-1ubuntu0.1"}]}],"versions":["1.41-1","1.42-1","1.42-1build1"],"ecosystem_specific":{"availability":"No subscription 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