{"id":"RLSA-2026:23231","summary":"Important: unbound security update","details":"The unbound packages provide a validating, recursive, and caching DNS or DNSSEC resolver. \n\nSecurity Fix(es):\n\n* unbound: Heap overflow and crash with multiple nsid, cookie, padding EDNS options (CVE-2026-42944)\n\n* unbound: Unbound DNSSEC Validator Denial of Service via Incorrect Write Offset Counter in Chase-Reply Messages (CVE-2026-42959)\n\n* unbound: Unbound DNSSEC Validator Use-After-Free via Deep Copy Pointer Overwrite Leading to DoS and Possible Remote Code Execution (CVE-2026-33278)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-06-06T12:30:04.845779040Z","published":"2026-06-06T12:04:50.645853Z","upstream":["CVE-2026-33278","CVE-2026-42944","CVE-2026-42959"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:23231"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479808"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479806"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479774"}],"affected":[{"package":{"name":"unbound","ecosystem":"Rocky Linux:10","purl":"pkg:rpm/rocky-linux/unbound?distro=rocky-linux-10&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.24.2-7.el10_2.1"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:23231.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}