Disclosure summary
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.
Source-reported weakness categories
CWE-20, CWE-835
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
NIST National Vulnerability Database · NVD-CVE-2021-41079
Open original source · Updated Oct 08, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
| Vendor | Product / association | Version / bounds |
|---|---|---|
| apache | tomcat | * {"versionStartIncluding":"10.0.0","versionEndIncluding":"10.0.2"} |
| debian | debian_linux | 9.0 |
| debian | debian_linux | 10.0 |
| debian | debian_linux | 11.0 |
| netapp | management_services_for_element_software_and_netapp_hci | - |
Original records & references
- NIST NVD record
- CVE Program record
- lists.apache.org
- lists.apache.org
- lists.apache.org — Mailing List, Vendor Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
- lists.apache.org
- lists.apache.org
- lists.apache.org — Mailing List, Vendor Advisory
- lists.debian.org — Mailing List, Third Party Advisory
- security.netapp.com — Third Party Advisory
- www.debian.org — Third Party Advisory
PUBLISHED 2021-09-16T11:15:07-04:00
MODIFIED 2026-10-08T18:17:12-04:00
INGESTED 2026-10-10T20:50:20-04:00