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CVE-2026-110257

CVE-2026-110257 · OW2 ASM 5.0 before 9.11 Excessive Memory Allocation via BootstrapMethods Attribute

This page contains facts from public vulnerability sources. Check the original advisory before updating.

OW2 ASM 5.0 before 9.11 contains an excessive memory allocation vulnerability in ClassReader.readBootstrapMethodsAttribute() that sizes an int array from num_bootstrap_methods without validating attribute_length. Attackers can supply a crafted class file of about 100 bytes that forces roughly 2 GB allocation, causing an OutOfMemoryError that crashes the JVM or consuming thread.

CVSS 6.8 · Medium · EPSS 0.2% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • asm

    Versions
    • ≥ 5.0, < 9.11: Affected (custom)

    Update to 9.11

  • asm Debian:12

    Versions
    • 9.10.1-1
    • 9.11.1-1
    • 9.4-1
    • 9.5-1
    • 9.7-1
    • 9.7-2
    • 9.7.1-1
    • 9.8-1
    • 9.8-2
    • 9.9.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Debian:13

    Versions
    • 9.10.1-1
    • 9.11.1-1
    • 9.8-1
    • 9.8-2
    • 9.9.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Debian:14

    Versions
    • 9.10.1-1
    • 9.8-1
    • 9.8-2
    • 9.9.1-1
    Affected ranges
    • ECOSYSTEM: < 9.11.1-1

    Update to 9.11.1-1

  • asm Ubuntu:18.04:LTS

    Versions
    • 6.0~alpha-1
    • 6.0~alpha-2
    • 6.0-1
    • 7.0-1~18.04
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Ubuntu:20.04:LTS

    Versions
    • 7.1-2
    • 7.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Ubuntu:22.04:LTS

    Versions
    • 9.1-1
    • 9.2-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Ubuntu:24.04:LTS

    Versions
    • 9.4-1
    • 9.5-1
    • 9.6~us1-0ubuntu1
    • 9.7-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Ubuntu:26.10

    Versions
    • 9.9.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

  • asm Ubuntu:26.04:LTS

    Versions
    • 9.8-1
    • 9.8-2
    • 9.9.1-1
    Affected ranges
    • ECOSYSTEM: (−∞, +∞)

    No fix published

Original sources

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