{"id":"CLSA-2026-1780055430","summary":"unbound: Fix of 3 CVEs","details":"- CVE-2026-42944: fix heap overflow when a query contains multiple NSID\n  or PADDING EDNS options; only emit each option once per query via\n  nsid_seen / padding_seen guards (COOKIE handler does not exist in 1.16.2)\n- CVE-2026-41292: cap parsed incoming EDNS options at 100 per query so\n  a flood of options cannot hold a resolver worker thread\n- CVE-2026-42959: fix DNSSEC-validation crash in val_fill_reply() by\n  using chase-\u003ens_numrrsets instead of the wrong orig-\u003ens_numrrsets\n  when computing the chase rrsets offset","modified":"2026-10-26T09:43:17.024126963Z","published":"2026-05-29T11:50:34Z","upstream":["CVE-2026-41292","CVE-2026-42944","CVE-2026-42959"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/centos-stream8els/CLSA-2026-1780055430.html"}],"affected":[{"package":{"name":"python3-unbound","ecosystem":"TuxCare:CentOS-Stream:8","purl":"pkg:rpm/tuxcare/python3-unbound?distro=centos-stream-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.2-5.el8.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos-stream8els/CLSA-2026-1780055430.json"}},{"package":{"name":"unbound","ecosystem":"TuxCare:CentOS-Stream:8","purl":"pkg:rpm/tuxcare/unbound?distro=centos-stream-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.2-5.el8.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos-stream8els/CLSA-2026-1780055430.json"}},{"package":{"name":"unbound-devel","ecosystem":"TuxCare:CentOS-Stream:8","purl":"pkg:rpm/tuxcare/unbound-devel?distro=centos-stream-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.2-5.el8.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos-stream8els/CLSA-2026-1780055430.json"}},{"package":{"name":"unbound-libs","ecosystem":"TuxCare:CentOS-Stream:8","purl":"pkg:rpm/tuxcare/unbound-libs?distro=centos-stream-8"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.16.2-5.el8.tuxcare.els7"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos-stream8els/CLSA-2026-1780055430.json"}}],"schema_version":"1.9.0"}