{"api_version":"1","generated_at":"2026-04-22T19:50:46+00:00","cve":"CVE-2022-3924","urls":{"html":"https://cve.report/CVE-2022-3924","api":"https://cve.report/api/cve/CVE-2022-3924.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2022-3924","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2022-3924"},"summary":{"title":"CVE-2022-3924","description":"This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1.","state":"PUBLIC","assigner":"security-officer@isc.org","published_at":"2023-01-26 21:16:00","updated_at":"2023-11-07 03:51:00"},"problem_types":["CWE-617"],"metrics":[],"references":[{"url":"https://kb.isc.org/docs/cve-2022-3924","name":"https://kb.isc.org/docs/cve-2022-3924","refsource":"MISC","tags":[],"title":"CVE-2022-3924: named configured to answer from stale cache may termina","mime":"text/html","httpstatus":"200","archivestatus":"200"},{"url":"https://www.cve.org/CVERecord?id=CVE-2022-3924","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-3924","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"-","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"9.16.12","cpe7":"s1","cpe8":"*","cpe9":"*","cpe10":"supported_preview","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"9.16.13","cpe7":"s1","cpe8":"*","cpe9":"*","cpe10":"supported_preview","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"9.16.14","cpe7":"s1","cpe8":"*","cpe9":"*","cpe10":"supported_preview","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"9.16.21","cpe7":"s1","cpe8":"*","cpe9":"*","cpe10":"supported_preview","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"9.16.32","cpe7":"s1","cpe8":"*","cpe9":"*","cpe10":"supported_preview","cpe11":"*","cpe12":"*","cpe13":"*"},{"cve_year":"2022","cve_id":"3924","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"isc","cpe5":"bind","cpe6":"9.16.36","cpe7":"s1","cpe8":"*","cpe9":"*","cpe10":"supported_preview","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[{"cve":"CVE-2022-3924","qid":"15133","title":"ISC 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(FEDORA-2023-a3d608daf4)"},{"cve":"CVE-2022-3924","qid":"284281","title":"Fedora Security Update for bind (FEDORA-2023-f1accd4b37)"},{"cve":"CVE-2022-3924","qid":"330142","title":"IBM AIX Denial of Service (DoS) ISC BIND Vulnerability (bind_advisory23)"},{"cve":"CVE-2022-3924","qid":"355145","title":"Amazon Linux Security Advisory for bind : ALAS2023-2023-161"},{"cve":"CVE-2022-3924","qid":"502648","title":"Alpine Linux Security Update for bind"},{"cve":"CVE-2022-3924","qid":"502710","title":"Alpine Linux Security Update for bind"},{"cve":"CVE-2022-3924","qid":"672936","title":"EulerOS Security Update for bind (EulerOS-SA-2023-1776)"},{"cve":"CVE-2022-3924","qid":"672958","title":"EulerOS Security Update for bind (EulerOS-SA-2023-1754)"},{"cve":"CVE-2022-3924","qid":"753669","title":"SUSE Enterprise Linux Security Update for bind (SUSE-SU-2023:0341-1)"},{"cve":"CVE-2022-3924","qid":"905386","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for bind (13221)"},{"cve":"CVE-2022-3924","qid":"905392","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for bind (13227)"},{"cve":"CVE-2022-3924","qid":"905651","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for bind (13221-1)"},{"cve":"CVE-2022-3924","qid":"906568","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for bind (13221-3)"},{"cve":"CVE-2022-3924","qid":"907317","title":"Common Base Linux Mariner (CBL-Mariner) Security Update for bind (13227-1)"},{"cve":"CVE-2022-3924","qid":"941004","title":"AlmaLinux Security Update for bind (ALSA-2023:2261)"},{"cve":"CVE-2022-3924","qid":"941073","title":"AlmaLinux Security Update for bind9.16 (ALSA-2023:2792)"}]},"source_records":{"cve_program":{"data_version":"4.0","data_type":"CVE","data_format":"MITRE","CVE_data_meta":{"ID":"CVE-2022-3924","ASSIGNER":"security-officer@isc.org","STATE":"PUBLIC"},"description":{"description_data":[{"lang":"eng","value":"This issue can affect BIND 9 resolvers with `stale-answer-enable yes;` that also make use of the option `stale-answer-client-timeout`, configured with a value greater than zero. If the resolver receives many queries that require recursion, there will be a corresponding increase in the number of clients that are waiting for recursion to complete. If there are sufficient clients already waiting when a new client query is received so that it is necessary to SERVFAIL the longest waiting client (see BIND 9 ARM `recursive-clients` limit and soft quota), then it is possible for a race to occur between providing a stale answer to this older client and sending an early timeout SERVFAIL, which may cause an assertion failure. This issue affects BIND 9 versions 9.16.12 through 9.16.36, 9.18.0 through 9.18.10, 9.19.0 through 9.19.8, and 9.16.12-S1 through 9.16.36-S1."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"affects":{"vendor":{"vendor_data":[{"vendor_name":"ISC","product":{"product_data":[{"product_name":"BIND 9","version":{"version_data":[{"version_value":"9.16.12","version_affected":"="},{"version_value":"9.18.0","version_affected":"="},{"version_value":"9.19.0","version_affected":"="},{"version_value":"9.16.12-S1","version_affected":"="}]}}]}}]}},"references":{"reference_data":[{"url":"https://kb.isc.org/docs/cve-2022-3924","refsource":"MISC","name":"https://kb.isc.org/docs/cve-2022-3924"}]},"source":{"discovery":"EXTERNAL"},"work_around":[{"lang":"en","value":"Disabling `stale-answer-client-timeout` entirely or setting the timeout value to zero prevents the problem.\n\nIt is not possible to disable the limit on `recursive-clients`, though it could be set to a very high value in order to reduce the likelihood of encountering this scenario. However, this is not recommended as the limit on recursive clients is important for preventing exhaustion of server resources."}],"exploit":[{"lang":"en","value":"We are not aware of any active exploits."}],"solution":[{"lang":"en","value":"Upgrade to the patched release most closely related to your current version of BIND 9: 9.16.37, 9.18.11, 9.19.9, or 9.16.37-S1."}],"credits":[{"lang":"en","value":"ISC would like to thank Maksym Odinintsev from AWS for bringing this vulnerability to our attention."}],"impact":{"cvss":[{"version":"3.1","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH"}]}},"nvd":{"publishedDate":"2023-01-26 21:16:00","lastModifiedDate":"2023-11-07 03:51:00","problem_types":["CWE-617"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:9.16.13:s1:*:*:supported_preview:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:9.16.21:s1:*:*:supported_preview:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:9.16.32:s1:*:*:supported_preview:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:9.16.14:s1:*:*:supported_preview:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","versionStartIncluding":"9.19.0","versionEndExcluding":"9.19.9","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","versionStartIncluding":"9.18.0","versionEndExcluding":"9.18.11","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:9.16.36:s1:*:*:supported_preview:*:*:*","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:*:*:*:*:-:*:*:*","versionStartIncluding":"9.16.12","versionEndExcluding":"9.16.37","cpe_name":[]},{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:isc:bind:9.16.12:s1:*:*:supported_preview:*:*:*","cpe_name":[]}]}]}},"legacy_mitre":{"record":null,"notes":[]}}}