{"schemaVersion":3,"id":"CVE-2026-3593","aliases":["ALPINE-CVE-2026-3593","UBUNTU-CVE-2026-3593","DEBIAN-CVE-2026-3593","openSUSE-SU-2026:10915-1"],"status":"published","duplicateOf":null,"title":null,"description":"A use-after-free vulnerability exists within the DNS-over-HTTPS implementation.\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 9.18.0 through 9.18.48 and 9.18.11-S1 through 9.18.48-S1 are NOT affected.","dates":{"published":"2026-05-20T13:09:47.178Z","modified":"2026-09-01T12:04:55.362Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.8,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":7.4,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Alpine","score":9.8,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":10,"impact":9.8,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · 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At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory \"belongs\" to the code that operates on the new pointer.","type":"weakness","status":"Stable","abstraction":"Variant","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/416.html"},{"id":"CWE-825","name":"Expired Pointer Dereference","description":"The product dereferences a pointer that contains a location for memory that was previously valid, but is no longer valid.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/825.html"}],"affected":[{"vendor":"alpine","product":"bind","name":"bind","label":"bind","ecosystem":"Alpine Linux","cpePart":null,"purl":"pkg:apk/alpine/bind","purlType":"apk","versions":[{"text":"≥ 9.20.0, < 9.18.49-r0","noFixRecorded":false,"fixedIn":null},{"text":"≥ 9.20.0, < 9.20.23-r0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 9.20.0, < 9.18.49-r0 | ≥ 9.20.0, < 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REDHAT"]},{"url":"https://security.alpinelinux.org/vuln/CVE-2026-3593","label":"security.alpinelinux.org/vuln/CVE-2026-3593","hostname":"security.alpinelinux.org","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-3593","label":"ubuntu.com/security/CVE-2026-3593","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-3593","label":"www.cve.org/CVERecord?id=CVE-2026-3593","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://ubuntu.com/security/notices/USN-8293-1","label":"ubuntu.com/security/notices/USN-8293-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-3593","label":"security-tracker.debian.org/tracker/CVE-2026-3593","hostname":"security-tracker.debian.org","tags":["Advisory"]},{"url":"https://www.suse.com/security/cve/CVE-2026-3593","label":"www.suse.com/security/cve/CVE-2026-3593","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-3593","label":"nvd.nist.gov/vuln/detail/CVE-2026-3593","hostname":"nvd.nist.gov","tags":["Oval","Advisory"]}],"lineage":{"upstream":[],"downstream":["MGASA-2026-0163","OPENSUSE-SU-2026:21123-1","RHSA-2026:7412","SUSE-SU-2026:22198-1","SUSE-SU-2026:2673-1","SUSE-SU-2026:2676-1"],"duplicates":[],"related":["OPENSUSE-SU-2026:21123-1","SUSE-SU-2026:22198-1","SUSE-SU-2026:2673-1","SUSE-SU-2026:2676-1","USN-8293-1"]},"timeline":[{"kind":"published","date":"2026-05-20T13:09:47.178Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-01T12:04:55.362Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T22:22:49.654Z","stale":false,"partial":false}}