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Date: Fri, 04 Nov 2022 17:35:34 +0000
From: "Gary D. Gregory" <>
Subject: CVE-2022-42920: Apache Commons BCEL prior to 6.6.0 allows
 producing arbitrary bytecode via out-of-bounds writing 


Apache Commons BCEL has a number of APIs that would normally only allow changing specific class characteristics. However, due to an out-of-bounds writing issue, these APIs can be used to produce arbitrary bytecode. This could be abused in applications that pass attacker-controllable data to those APIs, giving the attacker more control over the resulting bytecode than otherwise expected. Update to Apache Commons BCEL 6.6.0.

This issue is being tracked as BCEL-363


Reported by Felix Wilhelm (Google); GitHub pull request to Apache Commons BCEL #147 by Richard Atkins (; PR derived from OpenJDK ( commit 13bf52c8d876528a43be7cb77a1f452d29a21492 by Aleksei Voitylov and RealCLanger (Christoph Langer

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