---
id: CVE-2026-110260
title: >-
  OW2 ASM 3.0 before 9.11 contains a quadratic memory allocation vulnerability
  in MethodWriter.computeMaxStackAndLocal() and computeAllFrames() when using
  COMPUTE_MAXS or COMPUTE_FRAMES
summary: >-
  OW2 ASM 3.0 before 9.11 contains a quadratic memory allocation vulnerability
  in MethodWriter.computeMaxStackAndLocal() and computeAllFrames() when using
  COMPUTE_MAXS or COMPUTE_FRAMES. Attackers can supply a crafted class file with
  thous…
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-407
  - CWE-770
published: '2026-10-14'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:14:23.840'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110260'
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/MethodWriter.java#L1662
    label: disclosure@vulncheck.com
  - url: >-
      https://gitlab.ow2.org/asm/asm/-/commit/91057c98239d994aed5e46434e34e00d593c0daf
    label: disclosure@vulncheck.com
  - url: 'https://gitlab.ow2.org/asm/asm/-/merge_requests/461'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ow2-asm-3.0-before-9.11-quadratic-memory-allocation-via-exception-handlers
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-110260.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-110260'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2552285'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-110260'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-110260'
  - url: 'https://access.redhat.com/errata/RHSA-2026:83847'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ingestedAt: '2026-10-14T15:36:13.997Z'
vendor: OW2
product: ASM
affected:
  - ASM >= 3.0 < 9.11
epss: 0.00176
epssPercentile: 0.07087
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-20T00:59:30.315393Z'
patched:
  - hardened_images
---

## Overview

OW2 ASM 3.0 before 9.11 contains a quadratic memory allocation vulnerability in MethodWriter.computeMaxStackAndLocal() and computeAllFrames() when using COMPUTE_MAXS or COMPUTE_FRAMES. Attackers can supply a crafted class file with thousands of overlapping exception handlers, causing excessive Edge allocations and an OutOfMemoryError that crashes the JVM.

## Remediation

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

## Vendor advisories

- **RHSA-2026:83847** · Red Hat · fixed in: Red Hat Hardened Images · released 2026-10-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:83847)