Out-of-bounds Write Affecting bcel package, versions <6.0~rc3-2ubuntu1+esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
3.01% (87th percentile)

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  • Snyk IDSNYK-UBUNTU1604-BCEL-3106921
  • published22 Mar 2026
  • disclosed7 Nov 2022

Introduced: 7 Nov 2022

CVE-2022-42920  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Ubuntu:16.04 bcel to version 6.0~rc3-2ubuntu1+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bcel package and not the bcel package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1