{"id":"RHSA-2026:20589","summary":"Red Hat Security Advisory: dnsmasq security update","modified":"2026-05-26T10:32:21.589359908Z","published":"2026-05-26T10:07:41Z","upstream":["CVE-2026-2291","CVE-2026-4890","CVE-2026-4891","CVE-2026-4892","CVE-2026-4893"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:20589"},{"type":"ARTICLE","url":"https://access.redhat.com/security/updates/classification/#important"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2439088"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458516"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458517"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458518"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2458519"},{"type":"ADVISORY","url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_20589.json"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-2291"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-2291"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2291"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-4890"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-4890"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4890"},{"type":"ARTICLE","url":"https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018471.html"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-4891"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-4891"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4891"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-4892"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-4892"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4892"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-4893"},{"type":"ADVISORY","url":"https://www.cve.org/CVERecord?id=CVE-2026-4893"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4893"}],"affected":[{"package":{"name":"dnsmasq","ecosystem":"Red Hat:enterprise_linux:8::appstream","purl":"pkg:rpm/redhat/dnsmasq"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.79-36.el8_10"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2026:20589.json"}},{"package":{"name":"dnsmasq-debuginfo","ecosystem":"Red Hat:enterprise_linux:8::appstream","purl":"pkg:rpm/redhat/dnsmasq-debuginfo"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.79-36.el8_10"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2026:20589.json"}},{"package":{"name":"dnsmasq-debugsource","ecosystem":"Red Hat:enterprise_linux:8::appstream","purl":"pkg:rpm/redhat/dnsmasq-debugsource"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.79-36.el8_10"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2026:20589.json"}},{"package":{"name":"dnsmasq-utils","ecosystem":"Red Hat:enterprise_linux:8::appstream","purl":"pkg:rpm/redhat/dnsmasq-utils"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.79-36.el8_10"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2026:20589.json"}},{"package":{"name":"dnsmasq-utils-debuginfo","ecosystem":"Red Hat:enterprise_linux:8::appstream","purl":"pkg:rpm/redhat/dnsmasq-utils-debuginfo"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:2.79-36.el8_10"}]}],"database_specific":{"source":"https://security.access.redhat.com/data/osv/RHSA-2026:20589.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}