{"id":"USN-8929-1","summary":"bind9 vulnerabilities","details":"Zuyao Xu and Xiang Li discovered that Bind incorrectly handled certain\nmalformed DNSKEY records. A remote attacker could possibly use this issue\nto cause Bind to consume resources, resulting in a denial of service. This\nissue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, and Ubuntu 18.04\nLTS. (CVE-2025-8677)\n\nYuxiao Wu, Yunyi Zhang, Baojun Liu, and Haixin Duan discovered that Bind\nincorrectly accepted certain records from answers. A remote attacker could\npossibly use this issue to perform a cache poisoning attack. This issue\nonly affected Ubuntu 18.04 LTS. (CVE-2025-40778)\n\nSamy Medjahed discovered that Bind incorrectly handled insecure delegation\nvalidation. A remote attacker could possibly use this issue to cause\nexcessive NSEC3 iterations, consuming CPU resources, and leading to a\ndenial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04\nLTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-1519)\n\nIt was discovered that Bind incorrectly accepted NSEC3 records whose signer\nname did not match the owning zone. A remote attacker could possibly use\nthis issue to perform NSEC3 impersonation attacks, bypassing DNSSEC\nvalidation. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS,\nUbuntu 18.04 LTS, and Ubuntu 20.04 LTS. (CVE-2026-10723)\n\nIt was discovered that Bind incorrectly handled Key Records using the\nPRIVATEDNS algorithm. A remote attacker could possibly use this issue to\ncause Bind to crash, resulting in a denial of service. This issue only\naffected Ubuntu 20.04 LTS. (CVE-2026-10822)\n\nIt was discovered that Bind incorrectly handled wildcard CNAME expansion in\nResponse Policy Zones. A remote attacker could possibly use this issue to\nbypass configured RPZ policies. This issue only affected Ubuntu 20.04 LTS.\n(CVE-2026-11331)\n\nIt was discovered that Bind incorrectly tracked memory usage in the DNS\ncache. A remote attacker could possibly use this issue to cause Bind to use\nmemory beyond configured limits, leading to a denial of service. This issue\nonly affected Ubuntu 20.04 LTS. (CVE-2026-11622)\n\nIt was discovered that Bind incorrectly handled signed wildcard records\nwith label count discrepancies and RRSIG validation. A remote attacker\ncould possibly use this issue to perform cache poisoning attacks. This\nissue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS,\nand Ubuntu 20.04 LTS. (CVE-2026-11721)\n\nIt was discovered that Bind incorrectly handled DNSSEC validation when a\ndomain was covered by both NSEC and NSEC3 records with only one type having\nan RRSIG. A remote attacker could possibly use this issue to cause Bind to\ncrash, resulting in a denial of service. This issue only affected Ubuntu\n14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.\n(CVE-2026-13204)\n\nIt was discovered that Bind incorrectly validated out-of-zone NSEC next\nowner names during DNSSEC validation. A remote attacker could possibly use\nthis issue to bypass DNSSEC validation. This issue only affected Ubuntu\n14.04 LTS, Ubuntu 16.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 20.04 LTS.\n(CVE-2026-13321)\n\nIt was discovered that Bind incorrectly served zone transfer data before\nverifying the TSIG signature on multi-message transfers. A remote attacker\ncould possibly use this issue to send unauthorized zone contents to a\nsecondary server. (CVE-2026-19033)\n\nIt was discovered that Bind incorrectly handled the lifetime of cached\nDNSSEC proofs, leading to a use-after-free. A remote attacker could\npossibly use this issue to cause Bind to crash, resulting in a denial of\nservice. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS,\nUbuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-19662)\n\nIt was discovered that Bind incorrectly handled certain malformed answers\nwhen configured to use DNS64. A remote attacker could possibly use this\nissue to cause Bind to crash, resulting in a denial of service.\n(CVE-2026-19666)\n\nIt was discovered that Bind incorrectly handled oversized negative answers\nwhen storing them in the negative cache. A remote attacker could possibly\nuse this issue to cause Bind to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04\nLTS, and Ubuntu 26.04 LTS. (CVE-2026-19667)\n\nIt was discovered that Bind incorrectly handled large numbers of certain\ninvalid DNSSEC records during validation. A remote attacker could possibly\nuse this issue to cause Bind to use excessive resources, leading to a\ndenial of service. This issue only affected Ubuntu 26.04 LTS.\n(CVE-2026-19668)\n\nIt was discovered that Bind incorrectly accepted inapplicable NSEC records\nas proof that no wildcard existed. A remote attacker could possibly use\nthis issue to forge NXDOMAIN responses, masking the existence of wildcard\nrecords. (CVE-2026-19941)\n\nIt was discovered that Bind incorrectly handled repeated copies of records\nthat should only appear once, such as SOA, CNAME, or DNAME records. A\nremote attacker could possibly use this issue to cause Bind to use\nexcessive memory, leading to a denial of service. (CVE-2026-75029)\n\nIt was discovered that Bind incorrectly handled TKEY queries when the\nconfiguration did not contain a global options block. A remote attacker\ncould possibly use this issue to cause Bind to crash, resulting in a denial\nof service. This issue only affected Ubuntu 26.04 LTS. (CVE-2026-76163)\n\nIt was discovered that Bind incorrectly accepted NSEC3 records from\nunrelated sibling zones as proof of an insecure delegation. A remote\nattacker could possibly use this issue to bypass DNSSEC validation and\ninject forged unsigned answers. (CVE-2026-77119)\n\nIt was discovered that Bind incorrectly handled DNS-over-HTTPS requests\ncontaining invalid SIG(0) records when the connection was closed\nprematurely. A remote attacker could possibly use this issue to cause Bind\nto crash, resulting in a denial of service. This issue only affected Ubuntu\n26.04 LTS. (CVE-2026-77692)\n\nIt was discovered that Bind incorrectly treated NS or DNAME records above\nthe zone origin as zone cuts. An attacker could possibly use this issue to\ncause Bind to serve or cache out-of-zone data, resulting in cache\npoisoning. (CVE-2026-78301)\n\nIt was discovered that Bind incorrectly handled wildcard answers with both\nNSEC3 and NSEC proofs at the same owner name. A remote attacker could\npossibly use this issue to cause Bind to crash, resulting in a denial of\nservice. (CVE-2026-80274)\n\nIt was discovered that Bind incorrectly released resources when processing\nSVCB and HTTPS AliasMode records. A remote attacker could possibly use this\nissue to cause Bind to exhaust resources, leading to a denial of service.\nThis issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu 24.04\nLTS, and Ubuntu 26.04 LTS. (CVE-2026-81563)\n\nIt was discovered that Bind incorrectly limited additional processing for\ncached SVCB and HTTPS AliasMode records. A remote attacker could possibly\nuse this issue to cause Bind to use excessive CPU resources, leading to a\ndenial of service. This issue only affected Ubuntu 20.04 LTS, Ubuntu 22.04\nLTS, Ubuntu 24.04 LTS, and Ubuntu 26.04 LTS. (CVE-2026-81736)","modified":"2026-10-17T13:11:54.621775565Z","published":"2026-10-14T13:00:49Z","related":["UBUNTU-CVE-2025-40778","UBUNTU-CVE-2025-8677","UBUNTU-CVE-2026-10723","UBUNTU-CVE-2026-10822","UBUNTU-CVE-2026-11331","UBUNTU-CVE-2026-11622","UBUNTU-CVE-2026-11721","UBUNTU-CVE-2026-13204","UBUNTU-CVE-2026-13321","UBUNTU-CVE-2026-1519","UBUNTU-CVE-2026-19033","UBUNTU-CVE-2026-19662","UBUNTU-CVE-2026-19666","UBUNTU-CVE-2026-19667","UBUNTU-CVE-2026-19668","UBUNTU-CVE-2026-19941","UBUNTU-CVE-2026-75029","UBUNTU-CVE-2026-76163","UBUNTU-CVE-2026-77119","UBUNTU-CVE-2026-77692","UBUNTU-CVE-2026-78301","UBUNTU-CVE-2026-80274","UBUNTU-CVE-2026-81563","UBUNTU-CVE-2026-81736"],"upstream":["CVE-2025-40778","CVE-2025-8677","CVE-2026-10723","CVE-2026-10822","CVE-2026-11331","CVE-2026-11622","CVE-2026-11721","CVE-2026-13204","CVE-2026-13321","CVE-2026-1519","CVE-2026-19033","CVE-2026-19662","CVE-2026-19666","CVE-2026-19667","CVE-2026-19668","CVE-2026-19941","CVE-2026-75029","CVE-2026-76163","CVE-2026-77119","CVE-2026-77692","CVE-2026-78301","CVE-2026-80274","CVE-2026-81563","CVE-2026-81736","UBUNTU-CVE-2025-40778","UBUNTU-CVE-2025-8677","UBUNTU-CVE-2026-10723","UBUNTU-CVE-2026-10822","UBUNTU-CVE-2026-11331","UBUNTU-CVE-2026-11622","UBUNTU-CVE-2026-11721","UBUNTU-CVE-2026-13204","UBUNTU-CVE-2026-13321","UBUNTU-CVE-2026-1519","UBUNTU-CVE-2026-19033","UBUNTU-CVE-2026-19662","UBUNTU-CVE-2026-19666","UBUNTU-CVE-2026-19667","UBUNTU-CVE-2026-19668","UBUNTU-CVE-2026-19941","UBUNTU-CVE-2026-75029","UBUNTU-CVE-2026-76163","UBUNTU-CVE-2026-77119","UBUNTU-CVE-2026-77692","UBUNTU-CVE-2026-78301","UBUNTU-CVE-2026-80274","UBUNTU-CVE-2026-81563","UBUNTU-CVE-2026-81736"],"references":[{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8929-1"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-8677"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2025-40778"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-1519"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10723"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-10822"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-11331"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-11622"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-11721"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13204"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-13321"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19033"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19662"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19666"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19667"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19668"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-19941"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-75029"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-76163"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-77119"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-77692"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-78301"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-80274"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-81563"},{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-81736"}],"affected":[{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/bind9?arch=source&distro=esm-infra-legacy%2Ftrusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.9.5.dfsg-3ubuntu0.19+esm15"}]}],"versions":["1:9.9.3.dfsg.P2-4ubuntu1","1:9.9.3.dfsg.P2-4ubuntu2","1:9.9.3.dfsg.P2-4ubuntu3","1:9.9.5.dfsg-2","1:9.9.5.dfsg-3","1:9.9.5.dfsg-3ubuntu0.1","1:9.9.5.dfsg-3ubuntu0.2","1:9.9.5.dfsg-3ubuntu0.3","1:9.9.5.dfsg-3ubuntu0.4","1:9.9.5.dfsg-3ubuntu0.5","1:9.9.5.dfsg-3ubuntu0.6","1:9.9.5.dfsg-3ubuntu0.7","1:9.9.5.dfsg-3ubuntu0.8","1:9.9.5.dfsg-3ubuntu0.9","1:9.9.5.dfsg-3ubuntu0.10","1:9.9.5.dfsg-3ubuntu0.11","1:9.9.5.dfsg-3ubuntu0.12","1:9.9.5.dfsg-3ubuntu0.13","1:9.9.5.dfsg-3ubuntu0.14","1:9.9.5.dfsg-3ubuntu0.15","1:9.9.5.dfsg-3ubuntu0.16","1:9.9.5.dfsg-3ubuntu0.17","1:9.9.5.dfsg-3ubuntu0.18","1:9.9.5.dfsg-3ubuntu0.19","1:9.9.5.dfsg-3ubuntu0.19+esm1","1:9.9.5.dfsg-3ubuntu0.19+esm2","1:9.9.5.dfsg-3ubuntu0.19+esm3","1:9.9.5.dfsg-3ubuntu0.19+esm4","1:9.9.5.dfsg-3ubuntu0.19+esm5","1:9.9.5.dfsg-3ubuntu0.19+esm6","1:9.9.5.dfsg-3ubuntu0.19+esm7","1:9.9.5.dfsg-3ubuntu0.19+esm9","1:9.9.5.dfsg-3ubuntu0.19+esm10","1:9.9.5.dfsg-3ubuntu0.19+esm11","1:9.9.5.dfsg-3ubuntu0.19+esm12","1:9.9.5.dfsg-3ubuntu0.19+esm13","1:9.9.5.dfsg-3ubuntu0.19+esm14"],"ecosystem_specific":{"availability":"Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro","binaries":[{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15","binary_name":"bind9"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15","binary_name":"bind9-host"},{"binary_name":"bind9utils","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_name":"dnsutils","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_name":"host","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_name":"libbind9-90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_name":"libdns100","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15","binary_name":"libisc95"},{"binary_name":"libisccc90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_name":"libisccfg90","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"},{"binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15","binary_name":"liblwres90"},{"binary_name":"lwresd","binary_version":"1:9.9.5.dfsg-3ubuntu0.19+esm15"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-8929-1.json","cves_map":{"cves":[{"id":"CVE-2025-8677","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"}]},{"id":"CVE-2026-1519","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"id":"CVE-2026-10723","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-11721"},{"id":"CVE-2026-13204","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-13321"},{"id":"CVE-2026-19033","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L"},{"type":"Ubuntu","score":"medium"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-19666"},{"id":"CVE-2026-19668","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-19941","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"},{"type":"Ubuntu","score":"medium"}]},{"id":"CVE-2026-75029","severity":[{"score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","type":"CVSS_V3"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","type":"CVSS_V3"},{"type":"Ubuntu","score":"medium"}],"id":"CVE-2026-77119"},{"id":"CVE-2026-78301","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:H/A:N"},{"score":"medium","type":"Ubuntu"}]},{"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"score":"medium","type":"Ubuntu"}],"id":"CVE-2026-80274"}],"ecosystem":"Ubuntu:Pro:14.04:LTS"}}},{"package":{"name":"bind9","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/bind9?arch=source&distro=esm-infra-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm11"}]}],"versions":["1:9.9.5.dfsg-11ubuntu1","1:9.9.5.dfsg-12","1:9.9.5.dfsg-12.1","1:9.9.5.dfsg-12.1ubuntu1","1:9.10.3.dfsg.P2-4","1:9.10.3.dfsg.P2-5","1:9.10.3.dfsg.P4-3","1:9.10.3.dfsg.P4-4","1:9.10.3.dfsg.P4-5","1:9.10.3.dfsg.P4-8","1:9.10.3.dfsg.P4-8ubuntu1","1:9.10.3.dfsg.P4-8ubuntu1.1","1:9.10.3.dfsg.P4-8ubuntu1.2","1:9.10.3.dfsg.P4-8ubuntu1.3","1:9.10.3.dfsg.P4-8ubuntu1.4","1:9.10.3.dfsg.P4-8ubuntu1.5","1:9.10.3.dfsg.P4-8ubuntu1.6","1:9.10.3.dfsg.P4-8ubuntu1.7","1:9.10.3.dfsg.P4-8ubuntu1.8","1:9.10.3.dfsg.P4-8ubuntu1.9","1:9.10.3.dfsg.P4-8ubuntu1.10","1:9.10.3.dfsg.P4-8ubuntu1.11","1:9.10.3.dfsg.P4-8ubuntu1.12","1:9.10.3.dfsg.P4-8ubuntu1.14","1:9.10.3.dfsg.P4-8ubuntu1.15","1:9.10.3.dfsg.P4-8ubuntu1.16","1:9.10.3.dfsg.P4-8ubuntu1.17","1:9.10.3.dfsg.P4-8ubuntu1.18","1:9.10.3.dfsg.P4-8ubuntu1.19","1:9.10.3.dfsg.P4-8ubuntu1.19+esm1","1:9.10.3.dfsg.P4-8ubuntu1.19+esm2","1:9.10.3.dfsg.P4-8ubuntu1.19+esm3","1:9.10.3.dfsg.P4-8ubuntu1.19+esm5","1:9.10.3.dfsg.P4-8ubuntu1.19+esm6","1:9.10.3.dfsg.P4-8ubuntu1.19+esm7","1:9.10.3.dfsg.P4-8ubuntu1.19+esm8","1:9.10.3.dfsg.P4-8ubuntu1.19+esm9","1:9.10.3.dfsg.P4-8ubuntu1.19+esm10"],"ecosystem_specific":{"binaries":[{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm11","binary_name":"bind9"},{"binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm11","binary_name":"bind9-host"},{"binary_name":"bind9utils","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm11"},{"binary_name":"dnsutils","binary_version":"1:9.10.3.dfsg.P4-8ubuntu1.19+esm11"},{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