{"id":"CVE-2026-5947","aliases":["ALPINE-CVE-2026-5947","AZL-87099","BELL-CVE-2026-5947","DEBIAN-CVE-2026-5947","EUVD-2026-31110","GHSA-6mm6-m775-chpm","MGASA-2026-0163","RHSA-2026:7412","SUSE-SU-2026:22198-1","SUSE-SU-2026:2673-1","UBUNTU-CVE-2026-5947","openSUSE-SU-2026:10874-1","openSUSE-SU-2026:21123-1"],"status":"published","title":"SIG(0) validation during query flood may lead to undefined behavior","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.01387,"percentile":0.72434,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-362","CWE-367","CWE-416"],"published":"2026-05-20T00:00:00Z","modified":"2026-10-24T10:30:23Z","fixes":[{"ecosystem":"Alpine:v3.20","package":"bind","fixed_in":["9.18.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"bind","fixed_in":["9.18.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"bind","fixed_in":["9.20.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"bind","fixed_in":["9.20.23-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"bind","fixed_in":["9.20.23-r0"],"sources":["osv"]},{"ecosystem":"Azure Linux:3","package":"bind","fixed_in":["9.20.23-1"],"sources":["osv"]},{"ecosystem":"Alpaquita:23","package":"bind","fixed_in":["9.18.49-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:25","package":"bind","fixed_in":["9.20.23-r0"],"sources":["osv"]},{"ecosystem":"Alpaquita:stream","package":"bind","fixed_in":["9.20.23-r0"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"bind9","fixed_in":["1:9.20.23-1~deb13u1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"bind9","fixed_in":["1:9.20.23-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:25.10","package":"bind9","fixed_in":["1:9.20.11-1ubuntu2.4"],"sources":["osv"]},{"ecosystem":"Ubuntu:26.04:LTS","package":"bind9","fixed_in":["1:9.20.18-1ubuntu2.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.20","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.20.0"},{"fixed":"9.18.49-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.20.0"},{"fixed":"9.18.49-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.20.0"},{"fixed":"9.20.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.20.0"},{"fixed":"9.20.23-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.20.0"},{"fixed":"9.20.23-r0"}]}]},{"source":"osv","ecosystem":"Azure Linux:3","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-1"}]}]},{"source":"osv","ecosystem":"Alpaquita:23","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.18.11-r0"},{"fixed":"9.18.49-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:25","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.20.9-r0"},{"fixed":"9.20.23-r0"}]}]},{"source":"osv","ecosystem":"Alpaquita:stream","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.18.16-r0"},{"fixed":"9.20.23-r0"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"bind9","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.23-1~deb13u1"}]}],"versions":["1:9.20.11-4","1:9.20.15-1","1:9.20.15-1~deb13u1","1:9.20.15-1~deb13u1~bpo12+1","1:9.20.15-2","1:9.20.18-1","1:9.20.18-1~deb13u1","1:9.20.18-1~deb13u1~bpo12+1","1:9.20.19-1","1:9.20.19-1~bpo12+1","1:9.20.20-1","1:9.20.20-1~bpo12+1","1:9.20.21-1","1:9.20.21-1~deb13u1","1:9.20.21-1~deb13u1~bpo12+1","1:9.20.22-1","1:9.20.23-1~deb13u1~bpo12+1"]},{"source":"osv","ecosystem":"Debian:14","package":"bind9","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.23-1"}]}],"versions":["1:9.20.11-4","1:9.20.15-1","1:9.20.15-1~deb13u1","1:9.20.15-1~deb13u1~bpo12+1","1:9.20.15-2","1:9.20.18-1","1:9.20.18-1~deb13u1","1:9.20.18-1~deb13u1~bpo12+1","1:9.20.19-1","1:9.20.19-1~bpo12+1","1:9.20.20-1","1:9.20.20-1~bpo12+1","1:9.20.21-1","1:9.20.21-1~deb13u1","1:9.20.21-1~deb13u1~bpo12+1","1:9.20.22-1","1:9.20.23-1~deb13u1","1:9.20.23-1~deb13u1~bpo12+1"]},{"source":"osv","ecosystem":"Mageia:9","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.18.49-1.mga9"}]}],"bundled":6},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind-chroot","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind-devel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind-dnssec-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind-doc","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind-libs","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"Red Hat:hummingbird:1","package":"bind-utils","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:9.18.48-1.1.hum1"}]}],"bundled":2},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server 16.0","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-160000.1.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Server for SAP applications 16.0","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-160000.1.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Basesystem 15 SP7","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-150700.3.25.1"}]}],"bundled":6},{"source":"osv","ecosystem":"SUSE:Linux Enterprise Module for Server Applications 15 SP7","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-150700.3.25.1"}]}],"bundled":6},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"bind9","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.11-1ubuntu2.4"}]}],"versions":["1:9.20.4-3ubuntu1","1:9.20.4-3ubuntu2","1:9.20.4-3ubuntu3","1:9.20.9-2ubuntu1","1:9.20.10-1ubuntu1","1:9.20.11-1ubuntu1","1:9.20.11-1ubuntu2","1:9.20.11-1ubuntu2.1","1:9.20.11-1ubuntu2.2"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"bind9","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:9.20.18-1ubuntu2.1"}]}],"versions":["1:9.20.11-1ubuntu2","1:9.20.11-1ubuntu3","1:9.20.18-1ubuntu1","1:9.20.18-1ubuntu2"]},{"source":"osv","ecosystem":"openSUSE:Tumbleweed","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-1.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 16.0","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.20.23-160000.1.1"}]}],"bundled":6}],"products":[{"vendor":"isc","product":"bind"},{"vendor":"isc","product":"bind 9"},{"vendor":"red hat","product":"red hat enterprise linux 10"},{"vendor":"red hat","product":"red hat enterprise linux 6"},{"vendor":"red hat","product":"red hat enterprise linux 7"},{"vendor":"red hat","product":"red hat enterprise linux 8"},{"vendor":"red hat","product":"red hat enterprise linux 9"},{"vendor":"red hat","product":"red hat hardened images"},{"vendor":"red hat","product":"red hat openshift container platform 4"}],"references":[{"url":"https://kb.isc.org/docs/cve-2026-5947","tags":["vendor-advisory","Vendor Advisory","advisory","report"]},{"url":"https://downloads.isc.org/isc/bind9/9.20.23","tags":["patch","Patch","fix"]},{"url":"https://downloads.isc.org/isc/bind9/9.21.22","tags":["patch","Patch","fix"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-5947","tags":["vdb-entry","x_refsource_REDHAT","web","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479772","tags":["issue-tracking","x_refsource_REDHAT","report"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5947.json","tags":["x_sadp-csaf-vex","web"]},{"url":"https://access.redhat.com/errata/RHSA-2026:7412","tags":["vendor-advisory","x_refsource_REDHAT","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-5947","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-6mm6-m775-chpm"},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-5947","tags":["advisory"]},{"url":"https://docs.bell-sw.com/security/cves/CVE-2026-5947","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-5947","tags":["advisory"]},{"url":"https://advisories.mageia.org/MGASA-2026-0163.html","tags":["advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=35557","tags":["report"]},{"url":"https://www.openwall.com/lists/oss-security/2026/05/20/11","tags":["web"]},{"url":"https://images.redhat.com/","tags":["article"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-3593","tags":["report"]},{"url":"https://access.redhat.com/security/updates/classification/","tags":["article"]},{"url":"https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_7412.json","tags":["advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2479770","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-3593","tags":["advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3593","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-5947","tags":["advisory","report"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-202622198-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1265591","tags":["report"]},{"url":"https://bugzilla.suse.com/1265592","tags":["report"]},{"url":"https://bugzilla.suse.com/1265593","tags":["report"]},{"url":"https://bugzilla.suse.com/1265594","tags":["report"]},{"url":"https://bugzilla.suse.com/1265595","tags":["report"]},{"url":"https://bugzilla.suse.com/1265596","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2026-3039","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-3592","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-3593","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-5946","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-5947","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2026-5950","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2026/suse-su-20262673-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1263494","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2026-5947","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8293-1","tags":["advisory"]},{"url":"","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-5947","title":"SIG(0) validation during query flood may lead to undefined behavior","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:10:11.873Z","modified":"2026-09-01T12:05:00.589Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-362","CWE-416","CWE-367"],"updated_at":"2026-11-02T13:39:39.001586Z"}],"euvd":[{"id":"EUVD-2026-31110","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:10:11Z","modified":"2026-09-01T12:05:00Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T18:01:19.285273Z"}],"ghsa":[{"id":"GHSA-6mm6-m775-chpm","title":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If...","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T15:35:33Z","modified":"2026-06-30T03:36:46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-362","CWE-367"],"updated_at":"2026-11-02T15:09:05.34707Z"}],"nvd":[{"id":"CVE-2026-5947","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:16:40.303Z","modified":"2026-08-24T13:19:13.36Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-362","CWE-416","CWE-367"],"updated_at":"2026-11-02T14:12:19.752984Z"}],"osv":[{"id":"ALPINE-CVE-2026-5947","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:16:40.303Z","modified":"2026-10-01T02:17:49.366621598Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:27:50.764331Z"},{"id":"BELL-CVE-2026-5947","status":"published","published":"2026-05-21T06:10:54.85013Z","modified":"2026-05-28T07:15:27.442729734Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:24.657778Z"},{"id":"CVE-2026-5947","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:16:40.303Z","modified":"2026-10-24T10:30:23.734607051Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:12.496548Z"},{"id":"DEBIAN-CVE-2026-5947","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:16:40.303Z","modified":"2026-10-01T03:03:28.275873261Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:57.932517Z"},{"id":"RHSA-2026:7412","title":"Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update","status":"published","published":"2026-05-22T10:08:38Z","modified":"2026-10-10T10:21:12Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:22.928316Z"},{"id":"UBUNTU-CVE-2026-5947","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message. This issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1. BIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T00:00:00Z","modified":"2026-06-30T18:18:01.845853665Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T16:56:41.911783Z"},{"id":"AZL-87099","title":"CVE-2026-5947 affecting package bind for versions less than 9.20.23-1","description":"Undefined behavior may result due to a race condition leading to a use-after-free violation.  If BIND receives an incoming DNS message signed with SIG(0), it begins work to validate that signature.  If, during that validation, the \"recursive-clients\" limit is reached (as would occur during a query flood), and that same DNS message is discarded per the limit, there is a brief window of time while the SIG(0) validation may attempt to read the now-discarded DNS message.\nThis issue affects BIND 9 versions 9.20.0 through 9.20.22, 9.21.0 through 9.21.21, and 9.20.9-S1 through 9.20.22-S1.\nBIND 9 versions 9.18.28 through 9.18.49 and 9.18.28-S1 through 9.18.49-S1 are NOT affected.","status":"published","published":"2026-05-20T13:16:40Z","modified":"2026-08-28T17:56:59.738785Z","updated_at":"2026-11-02T15:28:10.677811Z"},{"id":"MGASA-2026-0163","title":"Updated bind packages fix security vulnerabilities","description":"Updated bind package fixes security vulnerabilities:\n* BIND 9 server memory exhaustion during GSS-API TKEY negotiation\n(CVE-2026-3039)\n* Amplification vulnerabilities via self-pointed glue records\n(CVE-2026-3592)\n* Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS\nimplementation (CVE-2026-3593)\n* Invalid handling of CLASS != IN (CVE-2026-5946)\n* SIG(0) validation during query flood may lead to undefined behavior\n(CVE-2026-5947)\n*Unbounded resend loop in BIND 9 resolver (CVE-2026-5950)\n","status":"published","published":"2026-05-29T05:12:50Z","modified":"2026-05-29T05:15:04.557137681Z","updated_at":"2026-11-02T15:49:43.178336Z"},{"id":"openSUSE-SU-2026:10874-1","title":"bind-9.20.23-1.1 on GA media","description":"These are all security issues fixed in the bind-9.20.23-1.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2026-05-28T00:00:00Z","modified":"2026-05-29T08:15:05.063079852Z","updated_at":"2026-11-02T16:58:38.95195Z"},{"id":"openSUSE-SU-2026:21123-1","title":"Security update for bind","description":"This update for bind fixes the following issues\n\nUpgrade to release 9.20.23:\n\n- CVE-2026-3039: BIND 9 server memory exhaustion during GSS-API TKEY negotiation (bsc#1265591).\n- CVE-2026-3592: Amplification vulnerabilities via self-pointed glue records (bsc#1265592).\n- CVE-2026-3593: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation (bsc#1265593).\n- CVE-2026-5946: Invalid handling of CLASS != IN (bsc#1265594).\n- CVE-2026-5947: SIG(0) validation during query flood may lead to undefined behavior (bsc#1265595).\n- CVE-2026-5950: Unbounded resend loop in BIND 9 resolver (bsc#1265596).\n","status":"published","published":"2026-06-20T06:54:39Z","modified":"2026-06-30T18:24:43.759740118Z","updated_at":"2026-11-02T16:58:41.885092Z"},{"id":"SUSE-SU-2026:22198-1","title":"Security update for bind","description":"This update for bind fixes the following issues\n\nUpgrade to release 9.20.23:\n\n- CVE-2026-3039: BIND 9 server memory exhaustion during GSS-API TKEY negotiation (bsc#1265591).\n- CVE-2026-3592: Amplification vulnerabilities via self-pointed glue records (bsc#1265592).\n- CVE-2026-3593: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation (bsc#1265593).\n- CVE-2026-5946: Invalid handling of CLASS != IN (bsc#1265594).\n- CVE-2026-5947: SIG(0) validation during query flood may lead to undefined behavior (bsc#1265595).\n- CVE-2026-5950: Unbounded resend loop in BIND 9 resolver (bsc#1265596).\n","status":"published","published":"2026-06-20T06:53:51Z","modified":"2026-06-24T09:00:08.091993442Z","updated_at":"2026-11-02T15:54:02.654057Z"},{"id":"SUSE-SU-2026:2673-1","title":"Security update for bind","description":"This update for bind fixes the following issues:\n\nSecurity issues:\n\n- CVE-2026-3039: BIND 9 server memory exhaustion during GSS-API TKEY negotiation (bsc#1265591).\n- CVE-2026-3592: Amplification vulnerabilities via self-pointed glue records (bsc#1265592).\n- CVE-2026-3593: Heap use-after-free vulnerability in BIND 9 DNS-over-HTTPS implementation (bsc#1265593).\n- CVE-2026-5946: Invalid handling of CLASS != IN (bsc#1265594).\n- CVE-2026-5947: SIG(0) validation during query flood may lead to undefined behavior (bsc#1265595).\n- CVE-2026-5950: Unbounded resend loop in BIND 9 resolver (bsc#1265596).\n\nNon security issue:\n\n- bind test failed with version 9.20.21 (bsc#1263494).\n- Upgrade to release 9.20.23\n","status":"published","published":"2026-07-02T15:04:39Z","modified":"2026-07-03T11:14:25.362998193Z","updated_at":"2026-11-02T15:54:04.519245Z"}]}}