{"id":"CVE-2021-41079","revision":"edc95962cd524fa495d6f9ae73adb621","records":[{"revision":"edc95962cd524fa495d6f9ae73adb621","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2021-41079","aliases":[],"title":"Apache Tomcat DoS with unexpected TLS packet","description":"Apache Tomcat 8.5.0 to 8.5.63, 9.0.0-M1 to 9.0.43 and 10.0.0-M1 to 10.0.2 did not properly validate incoming TLS packets. When Tomcat was configured to use NIO+OpenSSL or NIO2+OpenSSL for TLS, a specially crafted packet could be used to trigger an infinite loop resulting in a denial of service.","state":0,"publishedAt":"2021-09-16T14:40:25+00:00","modifiedAt":"2026-10-08T21:13:52.22+00:00","affected":[{"ecosystem":"Vendor product","name":"Apache Tomcat","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Apache Tomcat\",\n                    \"vendor\": \"Apache Software Foundation\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"Apache Tomcat 8.5 8.5.0 to 8.5.63\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"Apache Tomcat 9 9.0.0-M1 to 9.0.43\"\n                        },\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"Apache Tomcat 10 10.0.0-M1 to 10.0.2\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://lists.apache.org/thread.html/rccdef0349fdf4fb73a4e4403095446d7fe6264e0a58e2df5c6799434%40%3Cannounce.tomcat.apache.org%3E","https://lists.debian.org/debian-lts-announce/2021/09/msg00012.html","https://security.netapp.com/advisory/ntap-20211008-0005/","https://lists.apache.org/thread.html/rb4de81ac647043541a32881099aa6eb5a23f1b7fd116f713f8ab9dbe%40%3Cdev.tomcat.apache.org%3E","https://lists.apache.org/thread.html/r6b6b674e3f168dd010e67dbe6848b866e2acf26371452fdae313b98a%40%3Cusers.tomcat.apache.org%3E","https://www.debian.org/security/2021/dsa-4986"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2021-41079","license":"CVE Program Terms of Use","key":"cve-program:CVE-2021-41079","identifiers":["CVE-2021-41079"]},"retained":false,"historicalAffected":[]}],"coverage":[]}