Bug 2452456 (CVE-2026-33871) - CVE-2026-33871 netty: Netty: Denial of Service via HTTP/2 CONTINUATION frame flood
Summary: CVE-2026-33871 netty: Netty: Denial of Service via HTTP/2 CONTINUATION frame ...
Keywords:
Status: NEW
Alias: CVE-2026-33871
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2453262 2453263
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-03-27 21:02 UTC by OSIDB Bzimport
Modified: 2026-03-30 23:41 UTC (History)
110 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)

Description OSIDB Bzimport 2026-03-27 21:02:36 UTC 
Netty is an asynchronous, event-driven network application framework. In versions prior to 4.1.132.Final and 4.2.10.Final, a remote user can trigger a Denial of Service (DoS) against a Netty HTTP/2 server by sending a flood of `CONTINUATION` frames. The server's lack of a limit on the number of `CONTINUATION` frames, combined with a bypass of existing size-based mitigations using zero-byte frames, allows an user to cause excessive CPU consumption with minimal bandwidth, rendering the server unresponsive. Versions 4.1.132.Final and 4.2.10.Final fix the issue.
Note You need to log in before you can comment on or make changes to this bug.