{"id":"CLSA-2026-1791327169","summary":"unbound: Fix of 4 CVEs","details":"- CVE-2026-81642: fix heap buffer overflow when digesting DNSKEY\n- CVE-2026-81634: add the missing first owner name and signature length\n  bounds checks to rrset_canonical(), preventing a heap buffer overflow\n  during RRset canonicalisation\n- CVE-2026-82717: restore the packet buffer position on malformed names\n  in pkt_dname_len() and bound the copy lengths in rdata_copy(),\n  preventing heap corruption on the CNAME synthesis error path\n- CVE-2026-85501: bound DNSSEC validation work per query: key-tag\n  matches capped at 256, NSEC/NSEC3 verifications at 8 per message, new\n  val-validation-attempts and val-hash-attempts options (default 32),\n  oversized referral DS RRsets shortened to 20, and val-clean-additional\n  now defaults to no","modified":"2026-10-26T09:43:27.512691006Z","published":"2026-10-08T21:56:57Z","upstream":["CVE-2026-81634","CVE-2026-81642","CVE-2026-82717","CVE-2026-85501"],"references":[{"type":"ADVISORY","url":"https://errata.tuxcare.com/els_os/centos7els/CLSA-2026-1791327169.html"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81634"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-81642"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-82717"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-85501"}],"affected":[{"package":{"name":"unbound","ecosystem":"TuxCare:CentOS:7","purl":"pkg:rpm/tuxcare/unbound?distro=centos-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.6-5.0.1.el7_8.tuxcare.els2"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791327169.json"}},{"package":{"name":"unbound-devel","ecosystem":"TuxCare:CentOS:7","purl":"pkg:rpm/tuxcare/unbound-devel?distro=centos-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.6-5.0.1.el7_8.tuxcare.els2"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791327169.json"}},{"package":{"name":"unbound-libs","ecosystem":"TuxCare:CentOS:7","purl":"pkg:rpm/tuxcare/unbound-libs?distro=centos-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.6-5.0.1.el7_8.tuxcare.els2"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791327169.json"}},{"package":{"name":"unbound-python","ecosystem":"TuxCare:CentOS:7","purl":"pkg:rpm/tuxcare/unbound-python?distro=centos-7"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.6-5.0.1.el7_8.tuxcare.els2"}]}],"database_specific":{"source":"https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos7els/CLSA-2026-1791327169.json"}}],"schema_version":"1.9.0"}