CVE-2021-42340
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
DoS via memory leak with WebSocket connections
The fix for bug 63362 present in Apache Tomcat 10.1.0-M1 to 10.1.0-M5, 10.0.0-M1 to 10.0.11, 9.0.40 to 9.0.53 and 8.5.60 to 8.5.71 introduced a memory leak. The object introduced to collect metrics for HTTP upgrade connections was not released for WebSocket connections once the connection was closed. This created a memory leak that, over time, could lead to a denial of service via an OutOfMemoryError.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Apache Tomcat
- Vendor
- Apache Software Foundation
- Product
- Apache Tomcat
- Platforms
- Unknown
- Default status
Unknown
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| Apache Tomcat 10 10.0.0-M10 to 10.0.11 | affected | Unavailable | Unavailable | Unavailable | None listed |
| Apache Tomcat 10 10.1.0-M1 to 10.1.0-M5 | affected | Unavailable | Unavailable | Unavailable | None listed |
| Apache Tomcat 9 9.0.40 to 9.0.53 | affected | Unavailable | Unavailable | Unavailable | None listed |
| Apache Tomcat 8 8.5.60 to 8.5.71 | affected | Unavailable | Unavailable | Unavailable | None listed |