{"id":"CLSA-2026-1789036496","summary":"Fix CVE(s): CVE-2023-6516","details":"   * SECURITY UPDATE: unbounded cache-cleanup event queue lets a query\n     pattern drive named past max-cache-size\n     - debian/patches/CVE-2023-6516.patch: send tree-pruning events to a\n       dedicated rbtdb pruning task whose quantum is effectively unlimited\n       instead of the quantum-1 rbtdb-\u003etask, so the pruning queue drains at\n       least as fast as it is fed; traverse every eligible ancestor in one\n       prune_tree() execution; create the cache database tasks in\n       cache_create_db() so a cache flush keeps pruning alive\n     - takes upstream's final 9.16.49 design (GL #4596, GL #4621) and not\n       the superseded prunenodes-list design, so struct dns_rbtnode is\n       unchanged and MAPAPI stays at 1.1\n     - only decrement_reference() queues prune events on 9.10.3;\n       cleanup_dead_nodes() drains synchronously and is left untouched\n     - dns_db_settask() takes a second task argument; no reverse dependency\n       in this ELS set consumes that symbol\n     - CVE-2023-6516","modified":"2026-10-26T09:32:02.235766346Z","published":"2026-09-10T10:35:08Z","upstream":["CVE-2023-6516"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/ubuntu16.04els/CLSA-2026-1789036496.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-6516"}],"affected":[{"package":{"name":"bind9","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/bind9?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"bind9-doc","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/bind9-doc?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"bind9-host","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/bind9-host?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"bind9utils","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/bind9utils?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"dnsutils","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/dnsutils?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"host","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/host?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libbind-dev","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libbind-dev?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libbind-export-dev","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libbind-export-dev?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libbind9-140","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libbind9-140?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libdns-export162","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libdns-export162?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libdns162","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libdns162?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libirs-export141","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libirs-export141?distro=ubuntu-16.04"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:9.10.3.dfsg.P4-8ubuntu1.19+tuxcare.els12"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/ubuntu16.04els/CLSA-2026-1789036496.json"}},{"package":{"name":"libirs141","ecosystem":"TuxCare:Ubuntu:16.04","purl":"pkg:deb/tuxcare/libirs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