{"id":"UBUNTU-CVE-2025-40775","details":"When an incoming DNS protocol message includes a Transaction Signature (TSIG), BIND always checks it.  If the TSIG contains an invalid value in the algorithm field, BIND immediately aborts with an assertion failure. This issue affects BIND 9 versions 9.20.0 through 9.20.8 and 9.21.0 through 9.21.7.","modified":"2026-02-04T02:40:22.947517Z","published":"2025-05-21T00:00:00Z","withdrawn":"2026-01-20T05:33:06Z","related":["USN-7526-1"],"upstream":["CVE-2025-40775"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-40775"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2025-40775"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7526-1"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:25.04","purl":"pkg:deb/ubuntu/bind9@1:9.20.4-3ubuntu1.1?arch=source&distro=plucky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.4-3ubuntu1.1"}]}],"versions":["1:9.20.0-2ubuntu3","1:9.20.0-2ubuntu4","1:9.20.4-3ubuntu1"],"ecosystem_specific":{"availability":"No subscription required","binaries":[{"binary_name":"bind9","binary_version":"1:9.20.4-3ubuntu1.1"},{"binary_version":"1:9.20.4-3ubuntu1.1","binary_name":"bind9-dev"},{"binary_version":"1:9.20.4-3ubuntu1.1","binary_name":"bind9-dnsutils"},{"binary_name":"bind9-host","binary_version":"1:9.20.4-3ubuntu1.1"},{"binary_name":"bind9-libs","binary_version":"1:9.20.4-3ubuntu1.1"},{"binary_name":"bind9-utils","binary_version":"1:9.20.4-3ubuntu1.1"},{"binary_name":"bind9utils","binary_version":"1:9.20.4-3ubuntu1.1"},{"binary_name":"dnsutils","binary_version":"1:9.20.4-3ubuntu1.1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-40775.json"}}],"schema_version":"1.7.3","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"}]}