---
id: CVE-2026-110258
title: >-
  OW2 ASM 3.0 before 9.11 contains an excessive memory allocation vulnerability
  in Label.addSubroutineRetSuccessors() that fails to enforce the
  single-RET-per-JSR rule
summary: >-
  OW2 ASM 3.0 before 9.11 contains an excessive memory allocation vulnerability
  in Label.addSubroutineRetSuccessors() that fails to enforce the
  single-RET-per-JSR rule. Attackers can supply a crafted invalid class file
  with multiple RET in…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-789
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T17:18:25.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110258'
references:
  - url: 'https://asm.ow2.io/versions.html'
    label: disclosure@vulncheck.com
  - url: >-
      https://gitlab.ow2.org/asm/asm/-/blob/ASM_9_10_1/asm/src/main/java/org/objectweb/asm/Label.java#L568
    label: disclosure@vulncheck.com
  - url: >-
      https://gitlab.ow2.org/asm/asm/-/commit/4dabfe0aef14f8cccb0617640a4add8fbcc4ed36
    label: disclosure@vulncheck.com
  - url: 'https://gitlab.ow2.org/asm/asm/-/merge_requests/458'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-excessive-memory-allocation-via-multiple-ret-instructions
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-14T15:36:13.997Z'
---

## Overview

OW2 ASM 3.0 before 9.11 contains an excessive memory allocation vulnerability in Label.addSubroutineRetSuccessors() that fails to enforce the single-RET-per-JSR rule. Attackers can supply a crafted invalid class file with multiple RET instructions for one JSR, triggering a roughly 2 GB allocation that crashes the JVM.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.