{"id":"UBUNTU-CVE-2026-53689","details":"libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.","modified":"2026-06-23T22:00:08.002587824Z","published":"2026-06-11T00:00:00Z","related":["USN-8464-1"],"upstream":["CVE-2026-53689"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-53689"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-53689"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8464-1"}],"affected":[{"package":{"name":"libnfs","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.9.7-2","1.9.8-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnfs8","binary_version":"1.9.8-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}},{"package":{"name":"libnfs","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.11.0-2","1.11.0-3","2.0.0-1~exp1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnfs11","binary_version":"2.0.0-1~exp1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}},{"package":{"name":"libnfs","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.0-2ubuntu1","4.0.0-1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnfs-utils","binary_version":"4.0.0-1"},{"binary_name":"libnfs13","binary_version":"4.0.0-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}},{"package":{"name":"libnfs","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.0-1ubuntu0.1"}]}],"versions":["4.0.0-1","4.0.0-1build1","4.0.0-1build2"],"ecosystem_specific":{"binaries":[{"binary_version":"4.0.0-1ubuntu0.1","binary_name":"libnfs-utils"},{"binary_version":"4.0.0-1ubuntu0.1","binary_name":"libnfs13"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}},{"package":{"name":"libnfs","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.2-1ubuntu0.24.04.1"}]}],"versions":["4.0.0-1build2","5.0.2-1","5.0.2-1build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnfs-utils","binary_version":"5.0.2-1ubuntu0.24.04.1"},{"binary_version":"5.0.2-1ubuntu0.24.04.1","binary_name":"libnfs14"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}},{"package":{"name":"libnfs","ecosystem":"Ubuntu:25.10","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=questing"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.2-1ubuntu0.25.10.1"}]}],"versions":["5.0.2-1build1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"libnfs-utils","binary_version":"5.0.2-1ubuntu0.25.10.1"},{"binary_version":"5.0.2-1ubuntu0.25.10.1","binary_name":"libnfs14"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}},{"package":{"name":"libnfs","ecosystem":"Ubuntu:26.04:LTS","purl":"pkg:deb/ubuntu/libnfs?arch=source&distro=resolute"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.0.2-1ubuntu1.1"}]}],"versions":["5.0.2-1build1","5.0.2-1build2","5.0.2-1ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"libnfs-utils","binary_version":"5.0.2-1ubuntu1.1"},{"binary_name":"libnfs14","binary_version":"5.0.2-1ubuntu1.1"}],"availability":"No subscription required"},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53689.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:L"},{"type":"Ubuntu","score":"medium"}]}